An agreement usually between two parties that the one who has made an incorrect prediction about an uncertain outcome will forfeit something stipulated to the other; a wager.
An amount or object risked in a wager; a stake.
One on which a stake is or can be placed: Our team is a sure bet to win.
A plan or an option considered with regard to its probable consequence: Your best bet is to make reservations ahead of time.
Informal A view or opinion, especially about something that cannot be known at the present time: My bet is that the rain will hold off. My bet is he didn't do it.
verb: bet or bet·ted, bet·ting, bets.
transitive verb
To stake (an amount, for example) in a bet.
To make a bet with: I bet them that we would be first.
To make a bet on (a contestant or an outcome).
To maintain confidently, as if making a bet: I bet they were surprised by the news.
intransitive verb
To make or place a bet.
idioms
you bet
Of course; surely.
synonyms:
bet, ante, pot1stake, wager These nouns denote something valuable risked on an uncertain outcome: placed a 50-dollar bet in the first race; raising the ante in a poker game; won the whole pot at cards; played for high stakes; laid a wager on who would win.
The American Heritage® Dictionary of the English Language, Fourth Edition