to be defeated; to fail to win a competition, a court case, an argument, etc.; to cause somebody to be defeated
شکست خوردن, باختن, بازنده شدن, مغلوب شدن
So far they haven't lost a game.
to lose a race/an election/a battle/a war
We lost to a stronger team.
He lost by less than 100 votes.
We lost the game by three points.
They lost on penalties to Spain.
Many believe the incident lost them the election.