Synonyms of important

important

adjective

im-ˈpȯr-tᵊnt 

1

as in major

having great meaning or lasting effect

the discovery of penicillin was a very important event in the history of medicine

Synonyms & Similar Words

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

Antonyms & Near Antonyms

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

2

as in influential

having great power or influence

Rachel Carson was an important figure in the environmental movement

Synonyms & Similar Words

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

Antonyms & Near Antonyms

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

3

as in arrogant

having a feeling of superiority that shows itself in an overbearing attitude

an important businessman who always expects special treatment wherever he goes

Synonyms & Similar Words

• arrogant
• superior
• dominant
• cavalier
• masterful
• proud
• domineering
• assumptive
• high-and-mighty
• uppity
• dominating
• pretentious
• presumptuous
• bumptious
• uppish
• supercilious
• presuming
• huffish
• toplofty
• pompous
• imperious
• sniffy
• haughty
• high-hat
• lofty
• huffy
• smug
• high-handed
• peremptory
• authoritarian
• highfalutin
• chesty
• patronizing
• self-assertive
• overweening
• vain
• magisterial
• saucy
• bossy
• impudent
• pontifical
• disdainful
• snobbish
• condescending
• lordly
• stiff-necked
• snobby
• self-asserting
• boastful
• vainglorious
• impertinent
• egocentric
• bombastic
• snooty
• narcissistic
• cocky
• complacent
• uninhibited
• self-affected
• hubristic
• conceited
• self-centered
• egotistic
• blusterous
• egoistic
• prideful
• pontificating
• bragging
• braggy
• self-pleased
• swaggering
• immodest
• forward
• self-applauding
• extroverted
• blustery
• self-complacent
• self-satisfied
• stuck-up
• unreserved
• self-flattering
• orgulous
• brash
• self-conceited
• self-loving
• braggart
• self-promoting

Antonyms & Near Antonyms

• modest
• humble
• unpretentious
• lowly
• timid
• subdued
• shy
• shrinking
• passive
• bashful
• introverted
• diffident
• unarrogant
• unobtrusive
• sheepish
• compliant
• unassuming
• deferential
• quiet
• demure
• mousy
• submissive
• unaggressive
• meek
• overmodest
• yielding
• acquiescent
• unassertive
• self-critical
• reserved
• cringing
• retiring
• self-doubting
• cowering

4

as in proud

having too high an opinion of oneself

oh, you're so important—you think the world revolves around you

Synonyms & Similar Words

• proud
• smug
• arrogant
• vain
• confident
• consequential
• selfish
• domineering
• vainglorious
• assured
• self-important
• complacent
• biggety
• conceited
• egotistic
• egoistic
• prideful
• bigheaded
• pompous
• swellheaded
• self-satisfied
• masterful
• stuck-up
• superior
• fastuous
• self-conceited
• overweening
• snobbish
• cavalier
• bombastic
• assumptive
• boastful
• toplofty
• high-and-mighty
• uppity
• snobby
• cocky
• braggy
• bragging
• bumptious
• uppish
• supercilious
• disdainful
• snooty
• pontifical
• blusterous
• pretentious
• self-opinionated
• overconfident
• haughty
• high-hat
• swaggering
• presumptuous
• presuming
• huffy
• blustery
• self-assertive
• lofty
• self-confident
• high-handed
• holier-than-thou
• imperious
• chesty
• self-assured
• peremptory
• braggart
• patronizing
• highfalutin
• self-affected
• self-centered
• condescending
• self-applauding
• self-gratulatory
• lordly
• self-adulatory
• self-contented
• self-asserting
• self-engrossed
• self-dramatizing
• self-glorifying
• self-congratulatory
• self-promoting

Antonyms & Near Antonyms

• modest
• humble
• diffident
• egoless
• timid
• self-critical
• uncomplacent
• meek
• unassertive
• unassuming
• unpretentious
• self-reproachful
• down-to-earth
• self-distrustful
• self-reproving
• shrinking
• self-doubting
• shy
• introverted
• bashful
• retiring
• sheepish
• unarrogant
• overmodest
• mousy
• demure

Example Sentences

Recent Examples of important

The largest city in the Samara Oblast, about 900 km from the Ukrainian border, Samara is home to Russia’s most important manufacturer of rockets. — Eric Berger, ArsTechnica, 15 Aug. 2026

The power was on display during the opener of an important three-game series against the Detroit Tigers. — Lamond Pope, Chicago Tribune, 15 Aug. 2026

Michael Jordan’s most popular sneaker will serve as a tribute to one of the most important athletes of all time next year. — Riley Jones, Footwear News, 15 Aug. 2026

McEnroe’s testimony is particularly important, Sullivan explained, because while some of the other eyewitnesses were MSG guards or had been employed by MSG at some point, McEnroe had no such ties to the defendant. — Michael McCann, Sportico.com, 15 Aug. 2026