diff --git a/interface/src/Application.h b/interface/src/Application.h
index 4b32d8879b..3d2cb6f351 100644
--- a/interface/src/Application.h
+++ b/interface/src/Application.h
@@ -167,11 +167,11 @@ public:
     virtual controller::ScriptingInterface* getControllerScriptingInterface() { return _controllerScriptingInterface; }
     virtual void registerScriptEngineWithApplicationServices(ScriptEngine* scriptEngine) override;
 
-    virtual ViewFrustum* getCurrentViewFrustum() { return getDisplayViewFrustum(); }
-    virtual QThread* getMainThread() { return thread(); }
-    virtual PickRay computePickRay(float x, float y) const;
-    virtual glm::vec3 getAvatarPosition() const;
-    virtual qreal getDevicePixelRatio();
+    virtual ViewFrustum* getCurrentViewFrustum() override { return getDisplayViewFrustum(); }
+    virtual QThread* getMainThread() override { return thread(); }
+    virtual PickRay computePickRay(float x, float y) const override;
+    virtual glm::vec3 getAvatarPosition() const override;
+    virtual qreal getDevicePixelRatio() override;
 
     void setActiveDisplayPlugin(const QString& pluginName);
 
diff --git a/interface/src/avatar/Avatar.h b/interface/src/avatar/Avatar.h
index db247f3e85..b23b64b384 100644
--- a/interface/src/avatar/Avatar.h
+++ b/interface/src/avatar/Avatar.h
@@ -164,10 +164,10 @@ public:
     virtual void setOrientation(const glm::quat& orientation) override;
 
     // these call through to the SpatiallyNestable versions, but they are here to expose these to javascript.
-    Q_INVOKABLE virtual const QUuid getParentID() const { return SpatiallyNestable::getParentID(); }
-    Q_INVOKABLE virtual void setParentID(const QUuid& parentID);
-    Q_INVOKABLE virtual quint16 getParentJointIndex() const { return SpatiallyNestable::getParentJointIndex(); }
-    Q_INVOKABLE virtual void setParentJointIndex(quint16 parentJointIndex);
+    Q_INVOKABLE virtual const QUuid getParentID() const override { return SpatiallyNestable::getParentID(); }
+    Q_INVOKABLE virtual void setParentID(const QUuid& parentID) override;
+    Q_INVOKABLE virtual quint16 getParentJointIndex() const override { return SpatiallyNestable::getParentJointIndex(); }
+    Q_INVOKABLE virtual void setParentJointIndex(quint16 parentJointIndex) override;
 
     // NOT thread safe, must be called on main thread.
     glm::vec3 getUncachedLeftPalmPosition() const;
diff --git a/interface/src/avatar/AvatarMotionState.h b/interface/src/avatar/AvatarMotionState.h
index 715c38186b..04aa5ea57c 100644
--- a/interface/src/avatar/AvatarMotionState.h
+++ b/interface/src/avatar/AvatarMotionState.h
@@ -61,7 +61,7 @@ public:
 
     void addDirtyFlags(uint32_t flags) { _dirtyFlags |= flags; }
 
-    virtual void computeCollisionGroupAndMask(int16_t& group, int16_t& mask) const;
+    virtual void computeCollisionGroupAndMask(int16_t& group, int16_t& mask) const override;
 
     friend class AvatarManager;
     friend class Avatar;
@@ -72,7 +72,7 @@ protected:
     ~AvatarMotionState();
 
     virtual bool isReadyToComputeShape() const override { return true; }
-    virtual btCollisionShape* computeNewShape();
+    virtual btCollisionShape* computeNewShape() override;
 
     // The AvatarMotionState keeps a RAW backpointer to its Avatar because all AvatarMotionState
     // instances are "owned" by their corresponding Avatar instance and are deleted in the Avatar dtor.
diff --git a/interface/src/ui/overlays/ImageOverlay.h b/interface/src/ui/overlays/ImageOverlay.h
index 224cb42045..40da461822 100644
--- a/interface/src/ui/overlays/ImageOverlay.h
+++ b/interface/src/ui/overlays/ImageOverlay.h
@@ -20,7 +20,7 @@ class ImageOverlay : public QmlOverlay {
     
 public:
     static QString const TYPE;
-    virtual QString getType() const { return TYPE; }
+    virtual QString getType() const override { return TYPE; }
     static QUrl const URL;
 
     ImageOverlay();
diff --git a/interface/src/ui/overlays/TextOverlay.h b/interface/src/ui/overlays/TextOverlay.h
index 7c6e133ebd..53c1805345 100644
--- a/interface/src/ui/overlays/TextOverlay.h
+++ b/interface/src/ui/overlays/TextOverlay.h
@@ -30,7 +30,7 @@ public:
     void setText(const QString& text);
 
 
-    TextOverlay* createClone() const;
+    TextOverlay* createClone() const override;
     QSizeF textSize(const QString& text) const;  // Pixels
 };
 
diff --git a/libraries/animation/src/SwingTwistConstraint.h b/libraries/animation/src/SwingTwistConstraint.h
index f36dc851ea..f73bbfb233 100644
--- a/libraries/animation/src/SwingTwistConstraint.h
+++ b/libraries/animation/src/SwingTwistConstraint.h
@@ -51,7 +51,7 @@ public:
     virtual bool apply(glm::quat& rotation) const override;
 
     void setLowerSpine(bool lowerSpine) { _lowerSpine = lowerSpine; }
-    virtual bool isLowerSpine() const { return _lowerSpine; }
+    virtual bool isLowerSpine() const override { return _lowerSpine; }
 
     // SwingLimitFunction is an implementation of the constraint check described in the paper:
     // "The Parameterization of Joint Rotation with the Unit Quaternion" by Quang Liu and Edmond C. Prakash
diff --git a/libraries/entities-renderer/src/RenderableBoxEntityItem.h b/libraries/entities-renderer/src/RenderableBoxEntityItem.h
index 9addfd813a..67f881dbd8 100644
--- a/libraries/entities-renderer/src/RenderableBoxEntityItem.h
+++ b/libraries/entities-renderer/src/RenderableBoxEntityItem.h
@@ -22,8 +22,8 @@ public:
     static EntityItemPointer factory(const EntityItemID& entityID, const EntityItemProperties& properties);
     RenderableBoxEntityItem(const EntityItemID& entityItemID) : BoxEntityItem(entityItemID) { }
 
-    virtual void render(RenderArgs* args);
-    virtual void setUserData(const QString& value);
+    virtual void render(RenderArgs* args) override;
+    virtual void setUserData(const QString& value) override;
 
     SIMPLE_RENDERABLE()
 private:
diff --git a/libraries/entities-renderer/src/RenderableLightEntityItem.h b/libraries/entities-renderer/src/RenderableLightEntityItem.h
index aac1a4a998..2db913db0d 100644
--- a/libraries/entities-renderer/src/RenderableLightEntityItem.h
+++ b/libraries/entities-renderer/src/RenderableLightEntityItem.h
@@ -20,12 +20,12 @@ public:
     static EntityItemPointer factory(const EntityItemID& entityID, const EntityItemProperties& properties);
     RenderableLightEntityItem(const EntityItemID& entityItemID) : LightEntityItem(entityItemID) { }
 
-    virtual void render(RenderArgs* args);
-    virtual bool supportsDetailedRayIntersection() const { return true; }
+    virtual void render(RenderArgs* args) override;
+    virtual bool supportsDetailedRayIntersection() const override { return true; }
     virtual bool findDetailedRayIntersection(const glm::vec3& origin, const glm::vec3& direction,
                          bool& keepSearching, OctreeElementPointer& element, float& distance, 
                          BoxFace& face, glm::vec3& surfaceNormal,
-                         void** intersectedObject, bool precisionPicking) const;
+                         void** intersectedObject, bool precisionPicking) const override;
 
     SIMPLE_RENDERABLE();
 };
diff --git a/libraries/entities-renderer/src/RenderableLineEntityItem.h b/libraries/entities-renderer/src/RenderableLineEntityItem.h
index 9af8c0c8ba..1227c6e63d 100644
--- a/libraries/entities-renderer/src/RenderableLineEntityItem.h
+++ b/libraries/entities-renderer/src/RenderableLineEntityItem.h
@@ -24,7 +24,7 @@ public:
        _lineVerticesID(GeometryCache::UNKNOWN_ID)
     { }
 
-    virtual void render(RenderArgs* args);
+    virtual void render(RenderArgs* args) override;
 
     SIMPLE_RENDERABLE();
 
diff --git a/libraries/entities-renderer/src/RenderableSphereEntityItem.h b/libraries/entities-renderer/src/RenderableSphereEntityItem.h
index 737bee3134..5efe49854a 100644
--- a/libraries/entities-renderer/src/RenderableSphereEntityItem.h
+++ b/libraries/entities-renderer/src/RenderableSphereEntityItem.h
@@ -22,8 +22,8 @@ public:
     static EntityItemPointer factory(const EntityItemID& entityID, const EntityItemProperties& properties);
     RenderableSphereEntityItem(const EntityItemID& entityItemID) : SphereEntityItem(entityItemID) { }
 
-    virtual void render(RenderArgs* args);
-    virtual void setUserData(const QString& value);
+    virtual void render(RenderArgs* args) override;
+    virtual void setUserData(const QString& value) override;
 
     SIMPLE_RENDERABLE();
 
diff --git a/libraries/entities-renderer/src/RenderableTextEntityItem.h b/libraries/entities-renderer/src/RenderableTextEntityItem.h
index 149df946f7..cbe2b11c27 100644
--- a/libraries/entities-renderer/src/RenderableTextEntityItem.h
+++ b/libraries/entities-renderer/src/RenderableTextEntityItem.h
@@ -25,7 +25,7 @@ public:
     RenderableTextEntityItem(const EntityItemID& entityItemID) : TextEntityItem(entityItemID) { }
     ~RenderableTextEntityItem() { delete _textRenderer; }
 
-    virtual void render(RenderArgs* args);
+    virtual void render(RenderArgs* args) override;
 
     SIMPLE_RENDERABLE();
     
diff --git a/libraries/entities-renderer/src/RenderableWebEntityItem.h b/libraries/entities-renderer/src/RenderableWebEntityItem.h
index 799a414151..da1ddbf1a1 100644
--- a/libraries/entities-renderer/src/RenderableWebEntityItem.h
+++ b/libraries/entities-renderer/src/RenderableWebEntityItem.h
@@ -25,8 +25,8 @@ public:
     RenderableWebEntityItem(const EntityItemID& entityItemID);
     ~RenderableWebEntityItem();
 
-    virtual void render(RenderArgs* args);
-    virtual void setSourceUrl(const QString& value);
+    virtual void render(RenderArgs* args) override;
+    virtual void setSourceUrl(const QString& value) override;
     
     void setProxyWindow(QWindow* proxyWindow);
     QObject* getEventHandler();
diff --git a/libraries/physics/src/EntityMotionState.h b/libraries/physics/src/EntityMotionState.h
index 152ae7be23..2c999d0aca 100644
--- a/libraries/physics/src/EntityMotionState.h
+++ b/libraries/physics/src/EntityMotionState.h
@@ -29,13 +29,13 @@ public:
     virtual ~EntityMotionState();
 
     void updateServerPhysicsVariables();
-    virtual bool handleEasyChanges(uint32_t& flags);
-    virtual bool handleHardAndEasyChanges(uint32_t& flags, PhysicsEngine* engine);
+    virtual bool handleEasyChanges(uint32_t& flags) override;
+    virtual bool handleHardAndEasyChanges(uint32_t& flags, PhysicsEngine* engine) override;
 
     /// \return PhysicsMotionType based on params set in EntityItem
-    virtual PhysicsMotionType computePhysicsMotionType() const;
+    virtual PhysicsMotionType computePhysicsMotionType() const override;
 
-    virtual bool isMoving() const;
+    virtual bool isMoving() const override;
 
     // this relays incoming position/rotation to the RigidBody
     virtual void getWorldTransform(btTransform& worldTrans) const override;
@@ -48,8 +48,8 @@ public:
     bool shouldSendUpdate(uint32_t simulationStep, const QUuid& sessionID);
     void sendUpdate(OctreeEditPacketSender* packetSender, const QUuid& sessionID, uint32_t step);
 
-    virtual uint32_t getIncomingDirtyFlags();
-    virtual void clearIncomingDirtyFlags();
+    virtual uint32_t getIncomingDirtyFlags() override;
+    virtual void clearIncomingDirtyFlags() override;
 
     void incrementAccelerationNearlyGravityCount() { _accelerationNearlyGravityCount++; }
     void resetAccelerationNearlyGravityCount() { _accelerationNearlyGravityCount = 0; }
@@ -80,7 +80,7 @@ public:
 
     virtual QString getName() const override;
 
-    virtual void computeCollisionGroupAndMask(int16_t& group, int16_t& mask) const;
+    virtual void computeCollisionGroupAndMask(int16_t& group, int16_t& mask) const override;
 
     // eternal logic can suggest a simuator priority bid for the next outgoing update
     void setOutgoingPriority(quint8 priority);
@@ -93,7 +93,7 @@ protected:
     #endif
 
     virtual bool isReadyToComputeShape() const override;
-    virtual btCollisionShape* computeNewShape();
+    virtual btCollisionShape* computeNewShape() override;
     virtual void setMotionType(PhysicsMotionType motionType);
 
     // In the glorious future (when entities lib depends on physics lib) the EntityMotionState will be