doubles (Noun) — Badminton played with two players on each side.
doubles (Noun) — Tennis played with two players on each side.
doubles (Noun) — A base hit on which the batter stops safely at second base. ex. "he hit a double to deep centerfield"
doubles (Noun) — A stand-in for movie stars to perform dangerous stunts. ex. "his first job in Hollywood was as a double for Clark Gable"
doubles (Noun) — Someone who closely resembles a famous person (especially an actor). ex. "he could be Gingrich's double"
doubles (Noun) — A quantity that is twice as great as another. ex. "36 is the double of 18"
doubles (Noun) — Raising the stakes in a card game by a factor of 2. ex. "I decided his double was a bluff"
doubles (Noun) — A room (e.g. in a hotel) with a double bed. ex. "Do you have a double for tonight?"
doubles (Verb) — Increase twofold. ex. "The population doubled within 50 years"
doubles (Verb) — (baseball) hit a two-base hit.
doubles (Verb) — Bend over or curl up, usually with laughter or pain. ex. "He doubled and vomited violently"
doubles (Verb) — Do double duty; serve two purposes or have two functions. ex. "She doubles as his wife and secretary"
doubles (Verb) — (bridge) make a demand for (a card or suit).
doubles (Verb) — Make, do or perform again. ex. "He could never double his brilliant performance of the magic trick"