Definition of: bet

(bet) v. bet or (less commonly) bet·ted, bet·ting v.t.
1. To stake or pledge (money, etc.) in support of an opinion or on an uncertain outcome, as of a race.
2. To declare as in a bet: I'll bet he doesn't come.
—v.i.
3. To place a wager.
—you bet U.S. Slang Certainly.
—noun
1. The act of betting; a wager.
2. The stake in any wager.
3. That on which the bet is placed: The black horse is the best bet. [Origin uncertain]