double

used of homologous chromosomes associated in pairs in synapsis

bend over or curl up, usually with laughter or pain

“He doubled and vomited violently”

having two meanings with intent to deceive

“a sly double meaning”

increase twofold

“The population doubled within 50 years”

someone who closely resembles a famous person (especially an actor)

“he could be Gingrich's double”

a quantity that is twice as great as another

“36 is the double of 18”

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

do double duty; serve two purposes or have two functions

“She doubles as his wife and secretary”

hit a two-base hit

large enough for two

“a double bed”

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”

a stand-in for movie stars to perform dangerous stunts

“his first job in Hollywood was as a double for Clark Gable”