"Exit" is Latin for "he leaves". "Exeunt" is Latin for "theyleave". It's used when a whole bunch of people are leaving thestage at the same time.

The difference between exit and exeunt is a matter of quantity Exit is used where only one person is going out of the stage at that moment It is the opposite of entrance which… can be used for both words. In a sense it means that entrance can be used where more than one person is entering the stage or only one person. Eg Romeo exits the stage Exeunt on the other hand is the plural of exit (in Shakespearean time means "they are leaving") It was used to signify the exit of more than one person or everyone from the stage instead of saying eg Romeo exits the stage, Juliet exits the stage, John exits the stage, Victor exits the stage. All of this can all be said by simply saying "EXEUNT" (MORE)