1. (

• doubling

) increase by a factor of two; "doubling with a computer took no time at all" ;

2. (

• doubling ,
• double ,

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

1. (

• double ,
• duplicate

) increase twofold; "The population doubled within 50 years" ;

2. (

• double

) hit a two-base hit ;

3. (

• double_over ,
• double ,
• double_up

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

4. (

• double ,

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

5. (

• double ,

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

6. (

• duplicate ,
• reduplicate ,
• double ,
• repeat ,
• replicate

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

1. (

• double ,
• dual ,
• twofold ,
• two-fold ,
• treble ,
• threefold ,
• three-fold ,

) 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 ;

2. (

• double ,
• dual ,
• duple

) 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" ;

3. (

• double ,
• doubled ,
• twofold ,
• two-fold ,

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

4. (

• double ,

) 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" ;

5. (

• bivalent ,
• double

) used of homologous chromosomes associated in pairs in synapsis ;

6. (

• double

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

7. (

• double ,
• forked

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