double in WordNet English dictionary

1. used of homologous chromosomes associated in pairs in synapsis
   bivalent  double 
   
2. 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"
   double 
   
3. having two meanings with intent to deceive
   "a sly double meaning"; "spoke with forked tongue"
   double  forked 
   
4. large enough for two
   "a double bed"; "a double room"
   double 
   
5. twice as great or many
   "ate a double portion"; "the dose is doubled"; "a twofold increase"
   double  doubled  twofold  two-fold 
   
6. 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"
   double  dual  duple 
   
7. 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
   double  dual  twofold  two-fold  treble  threefold  three-fold 
   

1. a base hit on which the batter stops safely at second base
   "he hit a double to deep centerfield"
   double  two-base hit  two-bagger  two-baser 
   
2. raising the stakes in a card game by a factor of 2
   "I decided his double was a bluff"
   doubling  double 
   
3. a quantity that is twice as great as another
   "36 is the double of 18"
   double 
   
4. someone who closely resembles a famous person (especially an actor)
   "he could be Gingrich's double"; "she's the very image of her mother"
   double  image  look-alike 
   
5. a stand-in for movie stars to perform dangerous stunts
   "his first job in Hollywood was as a double for Clark Gable"
   double  stunt man  stunt woman 
   

1. increase twofold
   "The population doubled within 50 years"
   double  duplicate 
   
2. hit a two-base hit
   double 
   
3. do double duty; serve two purposes or have two functions
   "She doubles as his wife and secretary"
   double 
   
4. make or do or perform again
   "He could never replicate his brilliant performance of the magic trick"
   duplicate  reduplicate  double  repeat  replicate 
   
5. bend over or curl up, usually with laughter or pain
   "He doubled and vomited violently"
   double over  double  double up 
   
6. bridge: make a demand for (a card or suit)
   double 
   

1. to double the degree
   "she was doubly rewarded"; "his eyes were double bright"
   doubly  double  twice  doubly  double  twice 
   
2. two together
   "some people sleep better double"
   double  double 
   
3. downward and forward
   "he was bent double with pain"
   double  double