- free from doubt as to the reliability, character, action, etc., of something: to be sure of one's data.
- confident, as of something expected: sure of success.
- convinced, fully persuaded, or positive: to be sure of a person's guilt.
- assured or certain beyond question: a sure victory.
- worthy of confidence; reliable; stable: a sure messenger.
- unfailing; never disappointing expectations: a sure cure.
- unerring; never missing, slipping, etc.: a sure aim.
- admitting of no doubt or question: sure proof.
- destined; bound inevitably; certain: sure death.
- Obsolete. secure; safe.
- be sure, to take care (to be or do as specified); be certain: Be sure to close the windows.
- Informal. certainly; surely: It sure is cold out. Sure, I'll come.
- for sure, as a certainty; surely: It's going to be a good day, for sure.
- make sure, to be or become absolutely certain: I'm calling to make sure that you remember to come.
- sure enough, Informal. as might have been supposed; actually; certainly: Sure enough, the picnic was rained out.
- to be sure,
- without doubt; surely; certainly.
- admittedly: She sings well, to be sure, but she can't act.
Origin of sure
SynonymsSee more synonyms on Thesaurus.com
Examples from the Web for sure
“They sure took the Sony thing seriously,” Attkisson said dryly.Ex-CBS Reporter Sharyl Attkisson’s Battle Royale With the Feds
January 9, 2015
I like the idea of Jon Hamm… There have been discussions—though I'm not sure how serious they've been.‘Archer’ Creator Adam Reed Spills Season 6 Secrets, From Surreal Plotlines to Life Post-ISIS
January 8, 2015
To be sure, Jefferson did share the credit, but not in the way such a resolution might be interpreted.Forget the Resolutions; Try a Few Declarations
January 1, 2015
But people have always liked, and will like, the idea of a “sure thing.”The Fiery Death of Sotto Sotto, Toronto’s Celebrity Hotspot
December 30, 2014
Not sure if you noticed, but 2014 has been a banner year for animal robots.Meet Our Animal Robot Overlords
December 26, 2014
Without reasons I was sure of, you know, so there could be no chance of any mistake.
But if she had any such thing I'm sure it was ended, and she'd have jumped at this chance a year ago.
In you I was sure of a mind strong enough to break the fetters of habit.Philothea
Lydia Maria Child
"I just wanted to be sure you were all right," said Percival, greatly relieved.
"I am sure some of the old man's money is here," he said to himself.Brave and Bold
- (sometimes foll by of) free from hesitancy or uncertainty (with regard to a belief, conviction, etc)we are sure of the accuracy of the data; I am sure that he is lying
- (foll by of) having no doubt, as of the occurrence of a future state or eventsure of success
- always effective; unfailinga sure remedy
- reliable in indication or accuracya sure criterion
- (of persons) worthy of trust or confidencea sure friend
- not open to doubtsure proof
- admitting of no vacillation or doubthe is very sure in his beliefs
- bound to be or occur; inevitablevictory is sure
- (postpositive) bound inevitably (to be or do something); certainshe is sure to be there tonight
- physically secure or dependablea sure footing
- obsolete free from exposure to harm or danger
- be sure (usually imperative or dependent imperative; takes a clause as object or an infinitive, sometimes with to replaced by and) to be careful or certainbe sure and shut the door; I told him to be sure to shut the door
- for sure without a doubt; surely
- make sure
- (takes a clause as object)to make certain; ensure
- (foll by of)to establish or confirm power or possession (over)
- sure enough informal as might have been confidently expected; definitely: often used as a sentence substitute
- to be sure
- without doubt; certainly
- it has to be acknowledged; admittedly
- (sentence substitute) informal willingly; yes
- (sentence modifier) informal, mainly US and Canadian without question; certainly
Word Origin and History for sure
c.1300, "safe, secure," later "mentally certain" (mid-15c.), from Old French sur, seur "safe, secure," from Latin securus "free from care, untroubled, heedless, safe" (see secure (adj.)). Pronunciation development followed that of sugar. As an affirmative meaning "yes, certainly" it dates from 1803, from Middle English meanings "firmly established; having no doubt," and phrases like to be sure (1650s), sure enough (1540s), and for sure (1580s). The use as a qualifier meaning "assuredly" goes back to early 15c. Sure-footed is from 1630s; sure thing dates from 1836. In 16c.-17c., Suresby was an appellation for a person to be depended upon.