English dictionary

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English adjective: sure

1. sure having or feeling no doubt or uncertainty; confident and assured

SamplesFelt certain of success.
Was sure (or certain) she had seen it.
Was very sure in his beliefs.
Sure of her friends.


Similarconfident, convinced, positive

Attributeassurance, authority, certainty, confidence, self-assurance, self-confidence, sureness

Antonymsincertain, uncertain, unsure

2. sure exercising or taking care great enough to bring assurance

SamplesBe certain to disconnect the iron when you are through.
Be sure to lock the doors.




3. sure certain to occur; destined or inevitable

SamplesHe was certain to fail.
His fate is certain.
In this life nothing is certain but death and taxes.
He faced certain death.
Sudden but sure regret.
He is sure to win.


Similarbound, destined, doomed, fated, foreordained, in for, predestinate, predestined

See alsopredictable


4. sure physically secure or dependable

SamplesA sure footing.
Was on sure ground.


Antonymsunsafe, insecure

5. sure reliable in operation or effect

SamplesA quick and certain remedy.
A sure way to distinguish the two.
Wood dust is a sure sign of termites.


Similardependable, reliable

Antonymsundependable, unreliable

6. sure (of persons) worthy of trust or confidence

SamplesA sure (or trusted) friend.


Similartrustworthy, trusty

Antonymsuntrustworthy, untrusty

7. sure infallible or unfailing

SamplesA sure (or true) sign of one's commitment.



8. sure certain not to fail

SamplesA sure hand on the throttle.



9. sure impossible to doubt or dispute

SamplesIndisputable (or sure) proof.




English adverb: sure

1. sure definitely or positively (`sure' is sometimes used informally for `surely')

SamplesThe results are surely encouraging.
She certainly is a hard worker.
It's going to be a good day for sure.
They are coming, for certain.
They thought he had been killed sure enough.
He'll win sure as shooting.
They sure smell good.
Sure he'll come.

Synonymscertainly, for certain, for sure, sure as shooting, sure enough, surely

Domain usagecolloquialism

Based on WordNet 3.0 copyright © Princeton University.
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