diff --git a/docs/app/Components/IconSearch/IconSearch.js b/docs/app/Components/IconSearch/IconSearch.js
index e60843e407..d4346409e6 100644
--- a/docs/app/Components/IconSearch/IconSearch.js
+++ b/docs/app/Components/IconSearch/IconSearch.js
@@ -75,7 +75,7 @@ export default class IconSearch extends Component {
   renderIconColumn = (name) => (
     <Popup
       key={name}
-      mouseOverDelay={500}
+      mouseEnterDelay={500}
       inverted
       hoverable={false}
       size='mini'
diff --git a/src/addons/Portal/Portal.js b/src/addons/Portal/Portal.js
index 408bc95ab0..78f224af05 100644
--- a/src/addons/Portal/Portal.js
+++ b/src/addons/Portal/Portal.js
@@ -76,7 +76,7 @@ class Portal extends Component {
     mouseLeaveDelay: PropTypes.number,
 
     /** Milliseconds to wait before opening on mouse over */
-    mouseOverDelay: PropTypes.number,
+    mouseEnterDelay: PropTypes.number,
 
     /**
      * Called when a close event happens
@@ -120,7 +120,7 @@ class Portal extends Component {
     openOnTriggerFocus: PropTypes.bool,
 
     /** Controls whether or not the portal should open when mousing over the trigger. */
-    openOnTriggerMouseOver: PropTypes.bool,
+    openOnTriggerMouseEnter: PropTypes.bool,
 
     /** Controls whether the portal should be prepended to the mountNode instead of appended. */
     prepend: PropTypes.bool,
@@ -166,7 +166,7 @@ class Portal extends Component {
     this.unmountPortal()
 
     // Clean up timers
-    clearTimeout(this.mouseOverTimer)
+    clearTimeout(this.mouseEnterTimer)
     clearTimeout(this.mouseLeaveTimer)
   }
 
@@ -211,14 +211,14 @@ class Portal extends Component {
     this.mouseLeaveTimer = this.closeWithTimeout(e, mouseLeaveDelay)
   }
 
-  handlePortalMouseOver = (e) => {
+  handlePortalMouseEnter = (e) => {
     // In order to enable mousing from the trigger to the portal, we need to
     // clear the mouseleave timer that was set when leaving the trigger.
     const { closeOnPortalMouseLeave } = this.props
 
     if (!closeOnPortalMouseLeave) return
 
-    debug('handlePortalMouseOver()')
+    debug('handlePortalMouseEnter()')
     clearTimeout(this.mouseLeaveTimer)
   }
 
@@ -272,7 +272,7 @@ class Portal extends Component {
   }
 
   handleTriggerMouseLeave = (e) => {
-    clearTimeout(this.mouseOverTimer)
+    clearTimeout(this.mouseEnterTimer)
 
     const { trigger, closeOnTriggerMouseLeave, mouseLeaveDelay } = this.props
 
@@ -285,18 +285,18 @@ class Portal extends Component {
     this.mouseLeaveTimer = this.closeWithTimeout(e, mouseLeaveDelay)
   }
 
-  handleTriggerMouseOver = (e) => {
+  handleTriggerMouseEnter = (e) => {
     clearTimeout(this.mouseLeaveTimer)
 
-    const { trigger, mouseOverDelay, openOnTriggerMouseOver } = this.props
+    const { trigger, mouseEnterDelay, openOnTriggerMouseEnter } = this.props
 
     // Call original event handler
-    _.invoke(trigger, 'props.onMouseOver', e)
+    _.invoke(trigger, 'props.onMouseEnter', this.handleTriggerMouseEnter)
 
-    if (!openOnTriggerMouseOver) return
+    if (!openOnTriggerMouseEnter) return
 
-    debug('handleTriggerMouseOver()')
-    this.mouseOverTimer = this.openWithTimeout(e, mouseOverDelay)
+    debug('handleTriggerMouseEnter()')
+    this.mouseEnterTimer = this.openWithTimeout(e, mouseEnterDelay)
   }
 
   // ----------------------------------------
@@ -353,7 +353,7 @@ class Portal extends Component {
     // when re-rendering, first remove listeners before re-adding them to the new node
     if (this.portal) {
       this.portal.removeEventListener('mouseleave', this.handlePortalMouseLeave)
-      this.portal.removeEventListener('mouseover', this.handlePortalMouseOver)
+      this.portal.removeEventListener('mouseenter', this.handlePortalMouseEnter)
     }
 
     ReactDOM.unstable_renderSubtreeIntoContainer(
@@ -365,7 +365,7 @@ class Portal extends Component {
     this.portal = this.node.firstElementChild
 
     this.portal.addEventListener('mouseleave', this.handlePortalMouseLeave)
-    this.portal.addEventListener('mouseover', this.handlePortalMouseOver)
+    this.portal.addEventListener('mouseenter', this.handlePortalMouseEnter)
   }
 
   mountPortal = () => {
@@ -399,7 +399,7 @@ class Portal extends Component {
     this.node.parentNode.removeChild(this.node)
 
     this.portal.removeEventListener('mouseleave', this.handlePortalMouseLeave)
-    this.portal.removeEventListener('mouseover', this.handlePortalMouseOver)
+    this.portal.removeEventListener('mouseenter', this.handlePortalMouseEnter)
 
     this.node = null
     this.portal = null
@@ -421,7 +421,7 @@ class Portal extends Component {
       onClick: this.handleTriggerClick,
       onFocus: this.handleTriggerFocus,
       onMouseLeave: this.handleTriggerMouseLeave,
-      onMouseOver: this.handleTriggerMouseOver,
+      onMouseEnter: this.handleTriggerMouseEnter,
     })
   }
 }
diff --git a/src/modules/Popup/Popup.js b/src/modules/Popup/Popup.js
index 372271e05c..a177798f53 100644
--- a/src/modules/Popup/Popup.js
+++ b/src/modules/Popup/Popup.js
@@ -257,11 +257,11 @@ export default class Popup extends Component {
       portalProps.openOnTriggerFocus = true
       portalProps.closeOnTriggerBlur = true
     } else if (on === 'hover') {
-      portalProps.openOnTriggerMouseOver = true
+      portalProps.openOnTriggerMouseEnter = true
       portalProps.closeOnTriggerMouseLeave = true
       // Taken from SUI: https://git.io/vPmCm
       portalProps.mouseLeaveDelay = 70
-      portalProps.mouseOverDelay = 50
+      portalProps.mouseEnterDelay = 50
     }
 
     return portalProps
diff --git a/test/specs/addons/Portal/Portal-test.js b/test/specs/addons/Portal/Portal-test.js
index d36f145cd3..8c3d6bcb3c 100644
--- a/test/specs/addons/Portal/Portal-test.js
+++ b/test/specs/addons/Portal/Portal-test.js
@@ -271,14 +271,14 @@ describe('Portal', () => {
     })
   })
 
-  describe('openOnTriggerMouseOver', () => {
-    it('should not open portal on mouseover when not set', (done) => {
+  describe('openOnTriggerMouseEnter', () => {
+    it('should not open portal on mouseenter when not set', (done) => {
       const spy = sandbox.spy()
-      const trigger = <button onMouseOver={spy}>button</button>
-      const mouseOverDelay = 100
-      wrapperMount(<Portal trigger={trigger} mouseOverDelay={mouseOverDelay}><p>Hi</p></Portal>)
+      const trigger = <button onMouseEnter={spy}>button</button>
+      const mouseEnterDelay = 100
+      wrapperMount(<Portal trigger={trigger} mouseEnterDelay={mouseEnterDelay}><p>Hi</p></Portal>)
 
-      wrapper.find('button').simulate('mouseover')
+      wrapper.find('button').simulate('mouseenter')
       document.body.childElementCount.should.equal(0)
       spy.should.have.been.calledOnce()
 
@@ -286,28 +286,28 @@ describe('Portal', () => {
         document.body.childElementCount.should.equal(0)
         spy.should.have.been.calledOnce()
         done()
-      }, mouseOverDelay + 1)
+      }, mouseEnterDelay + 1)
     })
 
-    it('should open portal on mouseover when set', (done) => {
+    it('should open portal on mouseenter when set', (done) => {
       const spy = sandbox.spy()
-      const trigger = <button onMouseOver={spy}>button</button>
-      const mouseOverDelay = 100
+      const trigger = <button onMouseEnter={spy}>button</button>
+      const mouseEnterDelay = 100
       wrapperMount(
-        <Portal trigger={trigger} openOnTriggerMouseOver mouseOverDelay={mouseOverDelay}><p>Hi</p></Portal>
+        <Portal trigger={trigger} openOnTriggerMouseEnter mouseEnterDelay={mouseEnterDelay}><p>Hi</p></Portal>
       )
 
-      wrapper.find('button').simulate('mouseover')
+      wrapper.find('button').simulate('mouseenter')
       setTimeout(() => {
         document.body.childElementCount.should.equal(0)
         spy.should.have.been.calledOnce()
-      }, mouseOverDelay - 1)
+      }, mouseEnterDelay - 1)
 
       setTimeout(() => {
         document.body.lastElementChild.should.equal(wrapper.instance().node)
         spy.should.have.been.calledOnce()
         done()
-      }, mouseOverDelay + 1)
+      }, mouseEnterDelay + 1)
     })
   })
 
@@ -383,7 +383,7 @@ describe('Portal', () => {
   })
 
   describe('closeOnTriggerMouseLeave + closeOnPortalMouseLeave', () => {
-    it('should close portal on trigger mouseleave even when portal receives mouseover within limit', (done) => {
+    it('should close portal on trigger mouseleave even when portal receives mouseenter within limit', (done) => {
       const trigger = <button>button</button>
       const delay = 100
       wrapperMount(
@@ -392,9 +392,9 @@ describe('Portal', () => {
 
       wrapper.find('button').simulate('mouseleave')
 
-      // Fire a mouseOver on the portal within the time limit
+      // Fire a mouseEnter on the portal within the time limit
       setTimeout(() => {
-        domEvent.mouseOver(wrapper.instance().node.firstElementChild)
+        domEvent.mouseEnter(wrapper.instance().node.firstElementChild)
       }, delay - 1)
 
       // The portal should close because closeOnPortalMouseLeave not set
@@ -404,7 +404,7 @@ describe('Portal', () => {
       }, delay + 1)
     })
 
-    it('should not close portal on trigger mouseleave when portal receives mouseover within limit', (done) => {
+    it('should not close portal on trigger mouseleave when portal receives mouseenter within limit', (done) => {
       const trigger = <button>button</button>
       const delay = 100
       wrapperMount(
@@ -415,9 +415,9 @@ describe('Portal', () => {
 
       wrapper.find('button').simulate('mouseleave')
 
-      // Fire a mouseOver on the portal within the time limit
+      // Fire a mouseEnter on the portal within the time limit
       setTimeout(() => {
-        domEvent.mouseOver(wrapper.instance().node.firstElementChild)
+        domEvent.mouseEnter(wrapper.instance().node.firstElementChild)
       }, delay - 1)
 
       // The portal should not have closed
diff --git a/test/specs/modules/Popup/Popup-test.js b/test/specs/modules/Popup/Popup-test.js
index c9eac8dc21..fd55f5f8d1 100644
--- a/test/specs/modules/Popup/Popup-test.js
+++ b/test/specs/modules/Popup/Popup-test.js
@@ -176,7 +176,7 @@ describe('Popup', () => {
       const trigger = <button>foo</button>
       wrapperMount(<Popup content='foo' trigger={trigger} />)
 
-      wrapper.find('button').simulate('mouseover', nativeEvent)
+      wrapper.find('button').simulate('mouseenter', nativeEvent)
       setTimeout(() => {
         assertInBody('.ui.popup.visible')
         done()
diff --git a/test/utils/domEvent.js b/test/utils/domEvent.js
index 4774a02fe0..b4d0211ada 100644
--- a/test/utils/domEvent.js
+++ b/test/utils/domEvent.js
@@ -26,6 +26,14 @@ export const fire = (node, eventType, data = {}) => {
  */
 export const keyDown = (node, data) => fire(node, 'keydown', data)
 
+/**
+ * Dispatch a 'mouseenter' event on a DOM node.
+ * @param {String|Object} node A querySelector string or DOM node.
+ * @param {Object} [data] Additional event data.
+ * @returns {Object} The event
+ */
+export const mouseEnter = (node, data) => fire(node, 'mouseenter', data)
+
 /**
  * Dispatch a 'mouseleave' event on a DOM node.
  * @param {String|Object} node A querySelector string or DOM node.
@@ -60,6 +68,7 @@ export const click = (node, data) => fire(node, 'click', data)
 
 export default {
   fire,
+  mouseEnter,
   mouseLeave,
   mouseOver,
   mouseUp,