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certain

1 of 2

adjective

cer·​tain ˈsər-tᵊn How to pronounce certain (audio)
1
: fixed, settled
a certain percentage of the profit
2
: of a specific but unspecified character, quantity, or degree
the house has a certain charm
3
a
: dependable, reliable
a certain remedy for the disease
b
: known or proved to be true : indisputable
it is certain that we exist
4
a
: inevitable
the certain advance of age
b
: incapable of failing : destined
—used with a following infinitive
she is certain to do well
5
: assured in mind or action
I am certain they are right

certain

2 of 2

pronoun

plural in construction
: certain ones
certain of my generation W. B. Yeats
Phrases
for certain
: as a certainty : assuredly
the cause is not known for certain
of a certain age
: of a somewhat advanced age : no longer young
remembered by people of a certain age

Synonyms

Adjective

Choose the Right Synonym for certain

sure, certain, positive, cocksure mean having no doubt or uncertainty.

sure usually stresses the subjective or intuitive feeling of assurance.

felt sure that I had forgotten something

certain may apply to a basing of a conclusion or conviction on definite grounds or indubitable evidence.

police are certain about the cause of the fire

positive intensifies sureness or certainty and may imply opinionated conviction or forceful expression of it.

I'm positive that's the person I saw

cocksure implies presumptuous or careless positiveness.

you're always so cocksure about everything

Example Sentences

Adjective I'm fairly certain that I'll be on time. a certain person told me that today is your birthday
Recent Examples on the Web
Adjective
The law passed that year provided triggers that forced the legislature to place money into the rainy day fund — rather than spending it — if personal income taxes from Wall Street stock and bond gains exceeded certain levels. Christopher Keating, Hartford Courant, 18 Sep. 2022 The measures aim to protect the E.U. budget by making funding conditional on certain standards. Emily Rauhala, Washington Post, 18 Sep. 2022 And the court's docket for the term that begins in October is all but certain to have major repercussions for the 2024 presidential election. Phillip M. Bailey, USA TODAY, 18 Sep. 2022 Of course, this country offered a refuge for many Jewish families, and American Jews like me tend to grow up with a certain optimistic image of our country. James Mcauley, The New Yorker, 18 Sep. 2022 That unit of cloth was equal to a certain weight of silver. Francine Russo, Scientific American, 18 Sep. 2022 For a certain strain of the British population, the loss of the Commonwealth sounds like good news. Kojo Koram, The New Republic, 18 Sep. 2022 The new annual stocking level of 1 million fish will allow the Michigan DNR to increase numbers at certain sites and reinstate stocking at some sites that were discontinued, Wesley said. Paul A. Smith, Journal Sentinel, 18 Sep. 2022 But while most of us enjoy music, there are certain people who don't just like music... Ni'kesia Pannell, Woman's Day, 17 Sep. 2022 See More

Word History

Etymology

Adjective

Middle English certeyn, certayne, borrowed from Anglo-French certein, certain, going back to Vulgar Latin *certānus, from Latin certus "fixed, settled, indisputable," originally past participle of cernere "to sift, discern, decide, determine" (going back to an Indo-European present stem *kri-n-, verbal adjective *kri-to-, from a verbal base *krei̯̯̯(h1)- "sift, separate," whence Greek krī́nein "to separate, choose, decide," verbal adjective kritós, Welsh gogrynu "to sift") + -ānus + -an entry 2

Pronoun

Middle English certyn, derivative of certeyn certain entry 1

First Known Use

Adjective

13th century, in the meaning defined at sense 1

Pronoun

15th century, in the meaning defined above

Time Traveler
The first known use of certain was in the 13th century

Phrases Containing certain

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