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Definition of sure

sure

/ʃʊə/
sure

Adverb:surely
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sure Lexical Profile

sure Game Scores & Validity

• adjective

1

Completely confident that one is right; free from doubt or uncertainty.

Example

"Are you completely sure that you locked the front door before we left?"


2

Bound or destined to happen, perform an action, or achieve a result without fail.

Example

"With her extensive preparation and talent, she is sure to win the scholarship."


3

True beyond any doubt; reliable, unfailing, or indisputable.

Example

"The sudden return of the swallows is a sure sign that warmer weather has arrived."


4

Steady, firm, and not likely to slip, falter, or err.

Example

"The surgeon guided the scalpel with a steady and sure hand."

Synonyms
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Antonyms
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• interjection

1

Used to express assent, agreement, or willingness to comply with a request or suggestion.

Example

""Could you help me carry these boxes upstairs?" "Sure, I'd be happy to.""

Synonyms
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• adverb

1

North American Without doubt; certainly or indeed (used informally for emphasis).

Example

"It sure was cold waiting at the train station this morning."

Synonyms
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Word Nuance & Usage

When describing a person's mental state of certainty, 'sure' is used almost exclusively as a predicate adjective (e.g., 'I am sure of the answer,' never 'a sure person' in that sense), whereas it can be used attributively to mean reliable or inevitable (e.g., 'a sure sign of spring').

• Rhymes for sure

Word Origin & Etymology

Borrowed into Middle English from Old French 'sur' (earlier 'seur'), which derives from the Latin 'securus' ('free from care, safe, untroubled'), making it an etymological doublet of 'secure'.

Cite this Entry


Wordmom. (2026). Definition of Sure. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/sure
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