How do you quickly get information about a specific word? Have you seen a word and though it was being used improperly? Unsure of the meaning of a word and don’t want to load another app?
In most, if not all, apps you can simply hold down the command, control and ‘D’ keys and a pop up will open with the dictionary entry for that word. To get the window to close, just simply click elsewhere and it will disappear.