bettor Definition

bet
verb bet, betted, betting

tr & intr
1. To risk (a sum of money or other asset) on predicting the outcome or result of a future event, especially a race or other sporting event, in such a way that the better wins money if the outcome is as predicted, and loses the stake² if it is not.

Example: bet £5 on the favourite
Thesaurus: wager, gamble, stake, venture, hazard, speculate, risk, chance, ante.
2. To make a bet (of a specified amount with someone in particular), so that if one's prediction is correct one wins (that amount from them), and if not, one loses (that amount to them).

Example: She bet me £1 that you'd be late
Form: bet someone something (usually)
3. colloq
To feel sure or confident.
Example: I bet they'll be late

noun

1. An act of betting.

Thesaurus: wager, gamble, venture, hazard, ante, stake, chance, risk, speculation.
2. A sum of money, or other asset, betted.
3. colloq
An opinion or guess.
Example: My bet is that he's bluffing
4. colloq
A choice of action or way ahead.
Example: Our best bet is to postpone the trip

Derivative: better
noun

A person who bets.

Idiom: bet one's bottom dollar

To bet all one has.

Idiom: you bet

(specially US)
slang
Certainly; definitely; of course.

Etymology: 16c.

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better²
bettor bet