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Definitions

security

[si-kyoor-i-tee] / sɪˈkyʊər ɪ ti /
NOUN
safety, protection
Synonyms
STRONGEST
bond care freedom guarantee insurance preservation surveillance
STRONG
aegis agreement armament armor asylum bail collateral compact contract covenant cover custody defense earnest guard immunity pact pawn pledge precaution promise refuge retreat safeguard safekeeping safeness salvation sanctuary shelter shield surety token ward warrant
WEAK
safety measure
Antonyms
STRONG
break disagreement endangerment harm hurt injury
WEAK
danger insecurity peril trouble uncertainty worry
NOUN
peace of mind
Synonyms
STRONGEST
confidence freedom
STRONG
assurance calm certainty conviction ease positiveness reliance soundness sureness surety
Antonyms
STRONG
doubt uncertainty
WEAK
danger insecurity peril trouble worry

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.

He received security clearances to access sensitive U.S. government data.

From MarketWatch • Apr. 4, 2026

That security allowed us to do everything immigrants and their children are supposed to do: buy homes, build careers, contribute to civic life and love this country.

From Los Angeles Times • Apr. 4, 2026

The maximum security facility was closed in 1963.

From BBC • Apr. 4, 2026

Ukrainian President Volodymyr Zelensky meanwhile arrived in Ankara on Saturday for talks with Turkish President Recep Tayyip Erdogan. on security cooperation, a Ukrainian official told AFP.

From Barron's • Apr. 4, 2026

If he knew what that letter was, then why in the world wasn’t he marching it straight to a security officer like the good little rule follower that he was?

From "Glitch" by Laura Martin

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.