lose
     v 1: fail to keep or to maintain; cease to have, either
          physically or in an abstract sense; "She lost her purse
          when she left it unattended on her seat" [ant: {keep}]
     2: fail to win; "We lost the battle but we won the war" [ant: {win}]
     3: suffer the loss of a person through death or removal; "She
        lost her husband in the war"; "The couple that wanted to
        adopt the child lost her when the biological parents
        claimed her"
     4: place (something) where one cannot find it again; "I
        misplaced my eyeglasses" [syn: {misplace}, {mislay}]
     5: miss from one's possessions; lose sight of; "I've lost my
        glasses again!" [ant: {find}]
     6: allow to go out of sight; "The detective lost the man he was
        shadowing after he had to stop at a red light"
     7: fail to make money in a business; make a loss or fail to
        profit; "I lost thousands of dollars on that bad
        investment!"; "The company turned a loss after the first
        year" [syn: {turn a loss}] [ant: {profit}, {break even}]
     8: fail to get or obtain; "I lost the opportunity to spend a
        year abroad" [ant: {acquire}]
     9: retreat [syn: {fall back}, {drop off}, {fall behind}, {recede}]
        [ant: {gain}]
     10: fail to perceive or to catch with the senses or the mind; "I
         missed that remark"; "She missed his point"; "We lost
         part of what he said" [syn: {miss}]
     11: be set at a disadvantage; "This author really suffers in
         translation" [syn: {suffer}]
     [also: {lost}]
Source: WordNet® 2.0

lose vi. 1. [very common] To fail. A program loses when it encounters
   an exceptional condition or fails to work in the expected manner. 2. To
   be exceptionally unesthetic or crocky. 3. Of people, to be obnoxious or
   unusually stupid (as opposed to ignorant). See also {deserves to lose}.
   4. n. Refers to something that is {losing}, especially in the phrases
   "That's a lose!" and "What a lose!"


Source: The Jargon File