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

While Tehran's civilian government is seeking economic relief and sanctions easing, elements within the security establishment may view continued pressure in the strait as an important source of leverage. — Emma Graham, CNBC, 1 Aug. 2026

The new destroyer is expected to play an important role in protecting sea lanes, supporting allied naval operations, and providing a credible defense against advanced missile threats. — Prabhat Ranjan Mishra, Interesting Engineering, 1 Aug. 2026

Harris said because of the downtown blight, the city wants to get into the habit of maintaining and beautifying its important corridor. — Carole Carlson, Chicago Tribune, 1 Aug. 2026

Here’s a story from my past to drive home why this is important. — Tim Carter, Hartford Courant, 1 Aug. 2026