an agreement between two parties that a sum of money or other stake will be paid by the loser to the party who correctly predicts the outcome of an event
2.
the money or stake risked
3.
the predicted result in such an agreement
his bet was that the horse would win
4.
a person, event, etc, considered as likely to succeed or occur
it's a good bet that they will succeed
5.
a course of action (esp in the phrase one's best bet)