To part with unintentionally or unwillingly, as by accident, misfortune, negligence, penalty, forfeit, etc.; to be deprived of; as, to lose money from one's purse or pocket, or in business or gaming; to lose an arm or a leg by amputation; to lose men in battle.(verb)
source: webster1913
To suffer loss, disadvantage, or defeat; to be worse off, esp. as the result of any kind of contest.(verb)