English dictionary

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English adjective: certain

1. certain definite but not specified or identified

SamplesSet aside a certain sum each week.
To a certain degree.
Certain breeds do not make good pets.
Certain members have not paid their dues.
A certain popular teacher.
A certain Mrs. Jones.



2. certain 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

3. certain established beyond doubt or question; definitely known

SamplesWhat is certain is that every effect must have a cause.
It is certain that they were on the bus.
His fate is certain.
The date for the invasion is certain.

Similardefinite, indisputable, sure, sure as shooting

Attributecertainty, foregone conclusion, sure thing


4. certain 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


5. certain established irrevocably

SamplesHis fate is sealed.


Antonymsunsealed, uncertain

6. certain 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

7. certain 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.




Based on WordNet 3.0 copyright © Princeton University.
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