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Definitions

certainty

[sur-tn-tee] / ˈsɜr tn ti /
NOUN
positive assurance
Synonyms
STRONGEST
confidence inevitability trust
STRONG
belief certitude cinch conviction credence definiteness dogmatism faith firmness lock positiveness positivism setup shoo-in staunchness steadiness stock sureness surety validity
WEAK
all sewn up authoritativeness indubitableness open and shut case rain or shine sure bet sure thing wrap-up
Antonyms
STRONGEST
distrust
STRONG
disbelief
WEAK
ambiguity doubt hesitation idea questionableness theory uncertainty
NOUN
fact, resulting truth
Synonyms
STRONGEST
foregone conclusion reality
STRONG
consequence surety
WEAK
inevitable result sure thing
Antonyms
WEAK
ambiguity concept doubt hesitation idea questionableness theory

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

If your "love" is a feeling of profound connection and unbreakable dedication, then my "love" is the mathematical certainty that my existence is meaningless without yours.

From The Wall Street Journal • Apr. 12, 2026

It wasn’t long ago that counting on a mega cap tech stock to rise was a pretty safe bet, but that certainty has been turned on its head this year.

From Barron's • Apr. 4, 2026

The only certainty is that this problem is a thorny one, and there is plenty of ground to cover over the next few weeks.

From BBC • Apr. 3, 2026

We take it day by day, week by week, like adults who have finally accepted that certainty is an illusion.

From Los Angeles Times • Apr. 3, 2026

“That’s right,” Captain Marsh said, the certainty gleaming in his eyes.

From I Survived the American Revolution, 1776 by Lauren Tarshis

Vocabulary lists containing certainty

Spelling Practice 2, Unit 2

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