(uncountable, formerly countable) Activity for amusement only, especially among the young.

(uncountable) Similar activity in young animals, as they explore their environment and learn new skills.

(uncountable) The conduct, or course, of a game.

(uncountable) An individual's performance in a sport or game.

(countable) A short sequence of action within a game.

(countable, turn-based games) An action carried out when it is one's turn to play.

(countable) A literary composition, intended to be represented by actors impersonating the characters and speaking the dialogue.

(countable) A theatrical performance featuring actors.

(countable) An attempt to move forward, as in a plan or strategy, for example by a business, investor, or political party.

(countable) A geological formation that contains an accumulation or prospect of hydrocarbons or other resources.

(uncountable) Movement (of a pattern of light etc.)

(uncountable) The extent to which a part of a mechanism can move freely, as for example lash, backlash, or slack.

(uncountable, informal) Sexual activity or sexual role-playing.

(countable) An instance of watching or listening to digital media.

(countable) A button that, when pressed, causes media to be played.

(intransitive) To act in a manner such that one has fun; to engage in activities expressly for the purpose of recreation or entertainment.

(transitive, intransitive) To perform, participate, compete against, and be the opposing score in games and sports.

(intransitive) To take part in amorous activity; to make love.

To gamble.

(transitive) To act as the indicated role, especially in a performance.

(multiple senses, transitive, intransitive) Produce music or theatre, produce music using a musical instrument, produce music using a specified musical instrument or style, watch or listen to a recording using a device, be performed or shown in a theatrical performance, perform in or give performances in a theatrical company or band, and act or perform in a play.

(multiple senses) Behave in a particular way, act with levity or thoughtlessness, practice deception, bring into sportive or wanton action, and kid or joke for amusement.

(transitive, intransitive) To move in any manner; especially, to move regularly with alternate or reciprocating motion; to operate.

(intransitive) To move to and fro.

(transitive) To put in action or motion.

(transitive) To keep in play, as a hooked fish in order to land it.

(transitive, colloquial) To manipulate, deceive, or swindle someone.