Synonyms of important in English:

important


See definition of important

adjective

1‘an important meeting’

SYNONYMS
significant, consequential, momentous, of great moment, of import, of great import, of great consequence, far-reaching, major
critical, crucial, vital, pivotal, decisive, urgent, epoch-making, historic, seminal
serious, grave, substantial, weighty, signal, material
ANTONYMS

unimportant, trivial

2‘the important thing is that you do well in your A levels’

SYNONYMS
main, chief, principal, key, major, salient, prime, dominant, foremost, supreme, predominant, paramount, overriding, cardinal, crucial, vital, indispensable, critical, essential, significant, urgent
central, fundamental, basic
informal number-one
ANTONYMS

unimportant, inessential

3‘the school was important to the community’

SYNONYMS
of value, valuable, valued, useful, of use, beneficial, necessary, essential, indispensable, vital, of the essence
of concern, of interest, relevant, pertinent, material, germane
ANTONYMS

unimportant, irrelevant

4‘he was an important man’

SYNONYMS
powerful, influential, of influence, well connected, high-ranking, high-level, top-level, controlling, dominant, formidable
prominent, eminent, pre-eminent, notable, noteworthy, of note
distinguished, esteemed, respected, prestigious, celebrated, famous, great, grand
leading, foremost, outstanding
informal big, big time, major league, big league
ANTONYMS

unimportant, insignificant