Find emoji description on MacOS or iOS
On iOS

On iOS (and watchOS) you can use the Workflow app (which incidentally Apple has just purchased). It's free and is a fantastic tool for many reasons.

Within the app, one of the included workflows is called Name That Emoji. This allows you to enter your emoji and it'll give you the system name for it.

On macOS

On macOS you can use the keyboard menu bar icon to view the names. More specifically:


Go to Apple > System Preferences > Keyboard
Ensure the Keyboard tab is selected
Ensure the checkbox for Show Keyboard, Emoji and Symbol Viewers in menu bar is ticked
This will add a Keyboard Menu icon to the macOS menu bar
Exit System Preferences 
Click on the Keyboard Menu icon in the menu bar and select Show Emoji &amp; Symbols
Once it opens, click on the Emoji option in the left-hand pane
Now select an Emoji
You'll notice that on the right-hand side you'll see the selected Emoji as well as its name/meaning


NOTE: Steps 1-5 are only required to add the keyboard icon to the menu bar. Once you have added it (or if it's already in your menu bar) these steps are not required.