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Definitions

significant

[sig-nif-i-kuhnt] / sɪgˈnɪf ɪ kənt /
ADJECTIVE
telling, meaningful
Synonyms
STRONGEST
compelling important momentous powerful serious symbolic
WEAK
cogent convincing denoting eloquent expressing expressive facund forceful heavy indicative knowing meaning pregnant representative rich sententious sound suggestive valid weighty
Antonyms
STRONGEST
insignificant trivial unimportant
WEAK
meaningless minor
ADJECTIVE
important, critical
Synonyms
STRONGEST
big consequential considerable meaningful momentous notable noteworthy serious substantial vital
WEAK
big-deal big-wheel carrying a lot of weight heavy material weighty
Antonyms
STRONGEST
dull inconsequential insignificant little minor ordinary small trivial unimportant unnoticeable
WEAK
meaningless

Usage

What are other ways to say significant? The adjectives significant and meaningful, when describing forms of expression, imply an underlying and unexpressed thought whose existence is plainly shown although its precise nature is left to conjecture. Significant suggests conveying important or hidden meaning: On hearing this statement, he gave the officers a significant glance. Meaningful implies a secret and intimate understanding between the persons involved: Meaningful looks passed between them. Expressive suggests conveying, or being capable of conveying, a thought, intention, emotion, etc., in an effective or vivid manner: an expressive gesture. Suggestive implies an indirect or covert conveying of a meaning, sometimes mentally stimulating, sometimes verging on impropriety or indecency: a suggestive story or remark.

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.

“A lower job rate represents a significant, and we think still un-priced risk, to the housing sector,” he added.

From MarketWatch • Apr. 7, 2026

The resident doctor strike is likely to cause significant disruption to services, with those formerly called junior doctors making up nearly half of the medical workforce in the NHS.

From BBC • Apr. 7, 2026

“The total cost was around $125,000, including permits, construction and all systems — a significant investment, but one that ended up serving our family in unexpected ways.”

From Los Angeles Times • Apr. 7, 2026

It switched its domestic-route surcharge from a flat fee to a distance-based grid, while making more significant changes to its international flight routes.

From The Wall Street Journal • Apr. 7, 2026

“Fly has located a place of significant interest. The ground looks markedly different from here. It stands to reason that we could find a sample that contains signs of an ancient water supply there.”

From "A Rover's Story" by Jasmine Warga

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