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
• proud
• assumptive
• high-and-mighty
• uppity
• masterful
• pretentious
• presumptuous
• bumptious
• uppish
• supercilious
• huffish
• domineering
• toplofty
• pompous
• dominating
• presuming
• sniffy
• imperious
• haughty
• high-hat
• lofty
• huffy
• high-handed
• peremptory
• highfalutin
• chesty
• smug
• self-assertive
• authoritarian
• patronizing
• overweening
• magisterial
• saucy
• bossy
• impudent
• snobbish
• pontifical
• disdainful
• condescending
• lordly
• vain
• stiff-necked
• snobby
• self-asserting
• vainglorious
• impertinent
• egocentric
• bombastic
• boastful
• snooty
• narcissistic
• cocky
• complacent
• uninhibited
• self-affected
• hubristic
• conceited
• self-centered
• egotistic
• blusterous
• egoistic
• prideful
• braggy
• pontificating
• bragging
• self-pleased
• swaggering
• immodest
• self-applauding
• forward
• 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
• arrogant
• smug
• vain
• consequential
• confident
• vainglorious
• selfish
• assured
• self-important
• complacent
• biggety
• conceited
• egotistic
• egoistic
• bigheaded
• domineering
• pompous
• prideful
• swellheaded
• self-satisfied
• stuck-up
• fastuous
• self-conceited
• overweening
• snobbish
• bombastic
• assumptive
• toplofty
• superior
• high-and-mighty
• boastful
• uppity
• snobby
• cocky
• cavalier
• masterful
• braggy
• bumptious
• uppish
• bragging
• supercilious
• snooty
• disdainful
• pontifical
• blusterous
• pretentious
• self-opinionated
• overconfident
• haughty
• high-hat
• swaggering
• presumptuous
• huffy
• blustery
• self-assertive
• lofty
• self-confident
• high-handed
• holier-than-thou
• imperious
• chesty
• self-assured
• peremptory
• presuming
• 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

Cutting greenhouse gas emissions remains important because continued ocean warming could intensify ice loss beyond the changes already set in motion. — Kaif Shaikh, Interesting Engineering, 17 Oct. 2026

This emergent growth dynamic comes with important implications. — Justin Worland, Time, 17 Oct. 2026

Our medical staff and doctors in London reviewed the results and concluded that activity and mobility were important and that Jalen could safely play. — Alex Zietlow, Charlotte Observer, 15 Oct. 2026

Between Fletcher’s corn dogs, some Deep Fried Fat, Texas/OU at the Texas State Fair remains in the top five of college sporting events, and this version of a rivalry that is so important to this region lived up to its stature. — Mac Engel october 10, Fort Worth Star-Telegram, 11 Oct. 2026