1. Twice as great or many
   "the dose is doubled";
   - double, twofold, two-fold, bifold

1. Increase twofold
   "The population doubled within 50 years";
   - duplicate
    
2. Do double duty; serve two purposes or have two functions
   "She doubles as his wife and secretary"
    
3. Make, do or perform again
   "The actor doubled his performance for the evening show";
   - duplicate, reduplicate, repeat, replicate
    
4. Bend over or curl up, usually with laughter or pain
   "He doubled and vomited violently";
   - double over, double up
    
5. (baseball) hit a two-base hit
   "The batter doubled to left field, driving in two runs"
    
6. (bridge) make a demand for (a card or suit)
   "She doubled her partner's bid to show strong support"

See also: multiple, parlay

Type of: bend, bid, call, flex, function, go, hit, manifold, multiply, operate, reproduce, run, work

Encyclopedia: Doubled