double

a base hit on which the batter stops safely at second base; "he hit a double to deep centerfield"

a stand-in for movie stars to perform dangerous stunts; "his first job in Hollywood was as a double for Clark Gable"

someone who closely resembles a famous person (especially an actor); "he could be Gingrich's double"; "she's the very image of her mother"

a quantity that is twice as great as another; "36 is the double of 18"

raising the stakes in a card game by a factor of 2; "I decided his double was a bluff"

increase twofold; "The population doubled within 50 years"

hit a two-base hit

bend over or curl up, usually with laughter or pain; "He doubled and vomited violently"

do double duty; serve two purposes or have two functions; "She doubles as his wife and secretary"

bridge: make a demand for (a card or suit)

make or do or perform again; "He could never replicate his brilliant performance of the magic trick"

having more than one decidedly dissimilar aspects or qualities; "a double (or dual) role for an actor"; "the office of a clergyman is twofold; public preaching and private influence"- R.W.Emerson; "every episode has its double and treble meaning"-Frederick Harrison

consisting of or involving two parts or components usually in pairs; "an egg with a double yolk"; "a double (binary) star"; "double doors"; "dual controls for pilot and copilot"; "duple (or double) time consists of two (or a multiple of two) beats to a measure"

twice as great or many; "ate a double portion"; "the dose is doubled"; "a twofold increase"

used of flowers having more than the usual number of petals in crowded or overlapping arrangements; "double chrysanthemums have many rows of petals and are usually spherical or hemispherical"

used of homologous chromosomes associated in pairs in synapsis

large enough for two; "a double bed"; "a double room"

having two meanings with intent to deceive; "a sly double meaning"; "spoke with forked tongue"

downward and forward; "he was bent double with pain"

two together; "some people sleep better double"

to double the degree; "she was doubly rewarded"; "his eyes were double bright"