Entertaiment may refer to:

The act of entertaining; agreeable occupation for the mind; diversion; amusement: Solving the daily crossword is an entertainment for many.
A performance of some kind, giving pleasure or diverting the attention: She was the star of the evening’s entertainment.

The tenor of an entertaining event is often determined by the nature of the audience: A sexy show may entertain some, but offend others.

From Middle French entretenement, from Latin inter tenere (to hold within); also from tener, from the Indo-European root ten, meaning to stretch or extend. See more entries in the OED about Entertaiment.