Definition of bet:
the money risked on a gamble
the act of gambling; "he did it on a bet"
maintain with or as if with a bet; "I bet she will be there!"
stake on the outcome of an issue; "I bet $100 on that new horse"; "She played all her money on the dark horse"
have faith or confidence in; "you can count on me to help you any time"; "Look to your friends for support"; "You can bet on that!"; "Depend on your family in times of crisis"