01: To be unsuccessful in retaining possession of; mislay: He's always losing his car keys
1.To be deprived of (something one has had): lost her art collection in the fire; lost her job.
2.To be left alone or desolate
because of the death of: lost his wife.
3.To be unable to keep alive: a doctor who has lost very few patients.
4.To be unable to keep control or allegiance of: lost his temper at the meeting; is losing supporters by changing his mind.
5.To fail to win; fail in: lost the game; lost the court case.
6.To fail to use or take advantage of: Don't lose a chance to improve your position.
7.To fail to hear, see, or understand: We lost the plane in the fog
. I lost her when she started speaking about thermodynamics
02: To let (oneself) become unable to find the way.
To remove (oneself), as from everyday reality into a fantasy world.
8.To rid oneself of: lost five pounds
9.To consume aimlessly; waste: lost a week in idle occupations.
10.To wander from or become ignorant of: lose one's way.
11. To elude
or outdistance: lost their pursuers.
12. To be outdistanced by: chased the thieves but lost them.
13.To become slow by (a specified amount of time). Used of a timepiece
14.To cause or result in the loss of: Failure to reply to the advertisement lost her the job.
15.To cause to be destroyed. Usually used in the passive: Both planes were lost in the crash.
16.To cause to be damned.
of 'Lost' are in definitions..