How to use
past tense and past participle
, present participle
intransitive and transitive
to risk money on the result of a race, game, competition, or other future event
How much do you want to bet?
bet (somebody) that
He bet me £10 that I wouldn't do it.
bet (something) on something
She bet all her money on a horse that came last.
I wouldn't bet against him winning the championship this year.
used to say that you are fairly sure that something is true, something is happening etc, although you cannot prove this
Bet you wish you'd arrived earlier.
I bet you she won't come.
used to show that you understand or can imagine the situation that someone has just told you about
'God, I was so angry.' 'I bet you were.'
'It makes things much easier.' 'Yeah, I'll bet it does.'
used to show that you do not believe what someone has just told you
'I'm definitely going to give up smoking this time.' 'Yeah, I bet!'
used to emphasize that you agree with someone or are keen to do what they suggest
'Going to the party on Saturday?' ' You bet!'
you (can) bet your life/your bottom dollar
used when you are sure that you know what someone will do or what will happen
You can bet your bottom dollar he won't be back.
(do you) want to bet?/wanna bet?
used to say that you think something that someone has just said is not true or not likely to happen
'I'm sure Tom'll be here soon.' 'Wanna bet?'
don't bet on it
I wouldn't bet on it
used to say that you do not think something is likely to happen
He said he'd finish by tomorrow, but I wouldn't bet on it.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
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