Definition of "Double" :

noun: a base hit on which the batter stops safely at second base

"He hit a double to deep centerfield."

noun: raising the stakes in a card game by a factor of 2

"I decided his double was a bluff."

noun: a quantity that is twice as great as another

"36 is the double of 18."

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

"He could be Gingrich's double."

noun: a stand-in for movie stars to perform dangerous stunts

"His first job in Hollywood was as a double for Clark Gable."

verb: increase twofold

"The population doubled within 50 years."

verb: hit a two-base hit

verb: do double duty; serve two purposes or have two functions

"She doubles as his wife and secretary."

verb: make or do or perform again

verb: bend over or curl up, usually with laughter or pain

"He doubled and vomited violently."

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

adjective: having two meanings with intent to deceive

"A sly double meaning."

adjective: large enough for two

"A double bed."

adjective: used of homologous chromosomes associated in pairs in synapsis

adjective: twice as great or many

"Ate a double portion."

adjective: consisting of or involving two parts or components usually in pairs

"An egg with a double yolk."

adjective: having more than one decidedly dissimilar aspects or qualities

"A double (or dual) role for an actor."

adjective: 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."

adverb: to double the degree

"His eyes were double bright."

adverb: two together

"Some people sleep better double."

adverb: downward and forward

"He was bent double with pain."