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
2.fail to win;
We lost the battle but we won the war
3.suffer the loss of a person through death or removal;
She lost her husband in the war
4.place (something) where one cannot find it again;
I misplaced my eyeglasses
5.miss from one's possessions; lose sight of;
I've lost my glasses again!
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!
8.fail to get or obtain;
I lost the opportunity to spend a year abroad
9.retreat
10. fail to perceive or to catch with the senses or the mind;
I missed that remark
11. be set at a disadvantage;
This author really suffers in translation