Sure definition

Sure as an adjective

1. having or feeling no doubt or uncertainty; confident and assured

   "was sure (or certain) she had seen it"

   Same sense: certain

2. exercising or taking care great enough to bring assurance

   "be sure to lock the doors"

   Same sense: certain

3. certain to occur; destined or inevitable

   "sudden but sure regret"

   Same sense: certain

4. physically secure or dependable

   "a sure footing"

5. reliable in operation or effect

   "a sure way to distinguish the two"

   Same sense: certain

6. (of persons) worthy of trust or confidence

   "a sure (or trusted) friend"

   Same sense: trusted

7. infallible or unfailing

   "a sure (or true) sign of one's commitment"

8. certain not to fail

   "a sure hand on the throttle"

9. impossible to doubt or dispute

   "indisputable (or sure) proof"

   Same sense: indisputable

Sure as an adverb

10. definitely or positively (‘sure’ is sometimes used informally for ‘surely’)

    "the results are surely encouraging"

    Same sense: for sure, sure enough, for certain, certainly, sure as shooting, surely

Synonyms and antonyms

• certain definition
• trusted
• indisputable
• for sure
• sure enough
• for certain
• certainly
• sure as shooting
• surely

Opposite: unsure.

All synonyms of sure, sense by sense

How to say sure

Sure has 1 syllable and rhymes with tour. Syllable counts and rhymes come from the CMU Pronouncing Dictionary.

Words that rhyme with sure

• tour
• ensure
• secure
• pure
• cure
• mature
• assure
• obscure
• endure
• unsure
• miniature
• premature

All 32 words that rhyme with sure

SURE in word games

Scrabble

4

Words With Friends

5

Anagrams

4

Is SURE a valid Scrabble word? Yes, it is in the ENABLE list most word games use. Check SURE in the word checker, or unscramble SURE to see its 4 anagrams and the shorter words in its letters.