Certain definition

sûrtn
Sure (to happen, etc.); inevitable.
adjective
35
13
Fixed, settled, or determined.
adjective
24
7
Having or showing confidence; assured.

I'm certain I left my keys in this room.

adjective
19
3
Capable of being relied on; dependable.

A quick and certain remedy.

adjective
14
2
An indefinite but limited number; some.

Certain of the products are faulty.

pronoun
8
2
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A certain indefinite number; certain ones (of)

Certain of these authors are seldom read.

pronoun
5
0
Controlled; unerring.

His certain aim.

adjective
4
1
Not named or described, though definite and perhaps known.

A certain person.

adjective
4
1
Without any doubt; assured; sure; positive.

Certain of his innocence.

adjective
3
0
Perceptible; noticeable.

A certain charm; a certain air of mystery.

adjective
3
2
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The definition of certain is being absolutely sure of something, or something you are confident about, or to identify someone ("that certain person") who isn't explicitly named.

An example of certain is when you are confident that you let the dogs in earlier.

An example of certain is how you would identify someone without his name even though everyone knows who you are talking about.

adjective
1
0
Sure, positive, not doubting.

I was certain of my decision.

adjective
1
0
Not to be doubted or denied; established as a fact.
adjective
1
1
Actually existing; sure to happen; inevitable.

Bankruptcy is the certain outcome of your constant gambling and lending.

adjective
1
1
Not great; calculable.

To a certain degree; a certain delay in the schedule.

adjective
0
0
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Not specified or identified but assumed to be known.

Felt that certain breeds did not make good pets.

adjective
0
0
Named but not known or previously mentioned.

A certain Ms. Johnson.

adjective
0
0
Unfailing; infallible.
adjective
0
0
Fixed or stated; regular; determinate.
adjective
0
0
Not specifically named; indeterminate; indefinite; one or some; sometimes used independently as a noun, and meaning certain persons.
adjective
0
0
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Having been determined but unspecified. The quality of some particular subject or object which is known by the speaker to have been specifically singled out among similar entities of its class.

Certain people are good at running.

determiner
0
0
Sure to come or happen; inevitable.

Certain success.

adjective
0
1
Established beyond doubt or question; indisputable.

What is certain is that every effect must have a cause.

adjective
0
1
Not to be doubted; unquestionable.

Certain evidence.

adjective
0
1
Not failing; reliable; dependable.

A certain cure.

adjective
0
1
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Some, but not very much; appreciable.

To a certain extent.

adjective
0
1
Definite; fixed.

Set aside a certain sum each week.

adjective
0
2
for certain
  • Without doubt; definitely.
idiom
0
0
for certain
  • as a certainty; without doubt
idiom
0
0
of a certain age
  • of an unspecified age, but no longer young
idiom
0
0
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Idioms and Phrasal Verbs

Origin of certain

  • Middle English from Old French from Vulgar Latin certānus from Latin certus past participle of cernere to determine krei- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle English certain, certein, from Old French certain, from Vulgar Latin unattested form *certānus, extended form of Latin certus (“fixed, resolved, certain”), of the same origin as cretus, past participle of cernere (“to separate, perceive, decide”). Displaced native Middle English wis, iwis (“certain, sure”) (from Old English, ġewiss (“certain, sure”) and alternative Middle English spelling sertane (“some, certain”)

    From Wiktionary