Noun

1. One who plays any game.
2. An actor in a dramatic play.
3. One who plays on a musical instrument.
4. One who is playful, given to games and other amusement; one without serious aims; an idler; a trifler.
5. A gamer; a gamester.
6. A gambler.
7. A person who plays the field rather than having a long-term sexual relationship.
8. An electronic device that plays various audio and video media, such as CD player.
9. A software application that plays various audio and video formats.

Adjective

1. of something that "plays" itself, like certain automated devices