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

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