Synonyms of self-important in English:

self-important


See US English definition of self-important

See UK English definition of self-important

adjective

1‘he was given the nickname Colonel because he was so self-important’

SYNONYMS
conceited, arrogant, bumptious, self-assertive, full of oneself, puffed up, swollen-headed, pompous, overbearing, opinionated, self-opinionated, cocky, swaggering, strutting, presumptuous, forward, imperious, domineering, magisterial, pontifical, sententious, grandiose, vain, haughty, overweening, proud, egotistic, egotistical
supercilious, condescending, patronizing
informal snooty, uppity, uppish
ANTONYMS

humble