Synonyms of significant

significant

adjective

sig-ˈni-fi-kənt 

1

as in major

having great meaning or lasting effect

made a significant change in the procedure for applying for citizenship

Synonyms & Similar Words

• major
• important
• historic
• big
• substantial
• much
• meaningful
• monumental
• tectonic
• exceptional
• momentous
• remarkable
• distinguished
• pivotal
• consequential
• eventful
• notable
• noteworthy
• outstanding
• decisive
• serious
• earthshaking
• earth-shattering
• prominent
• distinctive
• weighty
• material
• strategic
• great
• crucial
• worthy
• valuable
• seminal
• impressive
• fatal
• worthwhile
• key
• fateful
• critical
• famous
• sincere
• earnest
• prestigious
• eminent
• essential
• grave
• central
• illustrious
• notorious
• heavy
• vital
• all-important
• renowned
• noble
• preeminent

Antonyms & Near Antonyms

• small
• minor
• little
• insignificant
• slight
• negligible
• trivial
• unimportant
• inconsiderable
• inconsequential
• trifling
• worthless
• petty
• paltry
• unknown
• obscure
• anonymous
• nameless
• uncelebrated

2

as in indicative

indicating something

the town's generous library budget is significant of the value its residents place on learning

Synonyms & Similar Words

• indicative
• reflective
• telltale
• characteristic
• signifying
• denotative
• symbolic
• denoting
• symptomatic
• referring
• allusive
• expressive
• demonstrative
• alluding
• exhibiting
• suggestive
• implying
• hinting
• insinuating
• connoting

3

as in influential

having great power or influence

a producer who is playing a significant role in the creation of the new film

Synonyms & Similar Words

• influential
• powerful
• important
• strong
• prominent
• potent
• mighty
• senior
• heavy
• notable
• outstanding
• great
• distinguished
• top
• heavy-duty
• celebrated
• capable
• able
• noteworthy
• effective
• dominant
• high-level
• puissant
• famous
• efficient
• competent
• renowned
• notorious
• prestigious
• robust
• eminent
• dynamic
• illustrious
• vigorous
• famed
• authoritarian
• despotic
• energetic
• noble
• autocratic
• tyrannical
• forceful
• dictatorial
• magisterial
• preeminent
• high-powered

Antonyms & Near Antonyms

• little
• insignificant
• unimportant
• weak
• powerless
• helpless
• impotent
• feeble
• unknown
• flimsy
• obscure
• infirm
• frail
• anonymous
• incapable
• ineffective
• nameless
• incompetent
• unfit
• unqualified
• unskilled
• uncelebrated
• inept
• inexpert
• unskillful

4

as in considerable

sufficiently large in size, amount, or number to merit attention

paid a significant amount of money for the movie rights to the book

Synonyms & Similar Words

• considerable
• substantial
• sizable
• major
• tremendous
• huge
• good
• substantive
• big
• great
• respectable
• handsome
• massive
• healthy
• goodly
• tidy
• largish
• biggish
• enormous
• hefty
• colossal
• voluminous
• immense
• gigantic
• bulky
• monumental
• oversize
• prodigious
• outsize
• astronomical
• mammoth
• whopping
• monstrous
• titanic
• herculean
• jumbo
• hulking
• elephantine
• bumper
• king-size

Antonyms & Near Antonyms

• insignificant
• negligible
• nominal
• inconsiderable
• inconsequential
• trivial
• unimportant
• insubstantial
• marginal
• slight
• trifling
• petty
• small
• puny
• meager
• paltry
• minute
• little
• tiny
• piddling
• measly
• picayune
• undersized
• diminutive
• pocket
• smallish
• miniature
• picayunish
• bitty
• pocket-size
• pygmy
• pint-size

5

as in suggestive

clearly conveying a special meaning (as one's mood)

after remarking that tardiness was on the rise, our boss cast a significant glance my way

Synonyms & Similar Words

• suggestive
• meaningful
• revealing
• eloquent
• expressive
• meaning
• reminiscent
• revelatory
• pregnant
• vivid
• graphic
• pictorial
• evocative
• rich
• redolent
• flavorful
• weighty
• sententious
• full-bodied

Antonyms & Near Antonyms

• blank
• vacant
• deadpan
• inexpressive
• expresionless
• unexpressive

Example Sentences

Recent Examples of significant

Built with significant financial backing from the European Commission, the site consolidates four distinct technical installations into a single industrial processing line. — Aman Tripathi, Interesting Engineering, 18 Sep. 2026

For people who have spent years with a smartphone within arm's reach, intentionally putting it away feels significant. — Kurt Knutsson, FOXNews.com, 18 Sep. 2026

The home was important part of Thomas and Robison’s life together in San Francisco and a significant portion of the estate will support organizations that meant a great deal to the couple. — Wendy Bowman, Robb Report, 18 Sep. 2026

Research has found that low serotonin levels could lead to the return of clinically significant depressive symptoms in people who have depression. — Amber Raiken, Verywell Health, 18 Sep. 2026

Phrases Containing significant

• significant other