adverb

no doubt

noh DOWT

No doubt (adverb) means Very probably; used to show that the speaker assumes something is true without being able to prove it. Example: “You are no doubt wondering why I called this meeting.”

adverb

Very probably; used to show that the speaker assumes something is true without being able to prove it.

"You are no doubt wondering why I called this meeting."

"She will no doubt claim she was never told."

phrase

informal Certainly; used to agree emphatically with what someone has just said.

""That was the best set of the night." "No doubt.""

noun

An absence of uncertainty, as in the fixed phrase there is no doubt that.

"There is no doubt that the policy has cost jobs."

How to Use No doubt

Learner’s notes

In plain EnglishAlmost certainly, or a way of saying 'I agree'.

When to use it

The adverb is neutral and common in writing; the one-word agreement use is casual speech only.

Memory tip

No doubt does not take 'that' when used as an adverb: 'He is no doubt right', not 'He is no doubt that right'.

Easily confused with

without a doubt undoubtedly → doubtless →

Common pairings

no doubt about it there is no doubt that you will no doubt recall

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Test yourself on “no doubt” A quick quiz — meaning, synonyms & usage →

Fill the Gap

Can you complete this real example?

You are _____ wondering why I called this meeting.

Synonyms

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definitely for sure absolutely

Related Words

very yes actually fucking quite exactly certainly completely

Rhymes for no doubt

doubt

See all rhymes for no doubt →

Frequently Asked Questions

What is the difference between no doubt and undoubtedly?

Undoubtedly states that something is genuinely certain. No doubt is usually weaker and often slightly ironic: it signals a confident assumption rather than proven fact, as in 'he will no doubt blame the weather'.

Is it no doubt or without a doubt?

Without a doubt is stronger and means truly certain. No doubt often carries a hint of 'I assume', so if you mean genuine certainty, use without a doubt.

Can no doubt be a full answer?

Yes. In informal speech, especially American English, 'No doubt' on its own means 'I agree completely'.

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