player-n; 4 Senses

Sense Number 1: a contender in a game, e.g., sports, cards

Commentary: PLAYER[+person][+contender][+game][+sport/+card/+quiz] [+role][+contender]

She became a professional tennis player at age sixteen.
John is an excellent poker player.
Mary's boyfriend is a decent billiards player.
We got to meet the baseball players before the game.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: a performer in a theatrical or musical production

Commentary: PLAYER[+person][+performer][+arts][+actor/+musician] [+role][+performer]

He had a long career on Broadway as a role player.
The bass player in that band also sings backup vocals.
The players who make up the cast are mostly British-trained actors.
The players of a string quartet perform without a conductor.

WordNet 3.0 Sense Numbers: 2, 3

Sense Number 3: a participant, decision maker

Commentary: PLAYER[+person][+participant][+decision] [+group][+participant][+decision] [+role][+participant]
NOTE: can be a person, organization or nation

Bob wants to be a player on Wall Street. (a major participant)
Their nation has been only a secondary player in Middle East negotiations.
Our firm is considered one of the primary players in the industry.

WordNet 3.0 Sense Numbers: 5

Sense Number 4: a playback device for audio or video recordings

Commentary: PLAYER[+device][+playback][+audio/+video]

The price of DVD players has gone down a lot in recent years.
My old cassette player finally gave out.