self-important

UK: /ˌsɛlfɪmˈpɔː^rt^ənt/ US: (self′im pôr′tnt, self′-)

WordReference Random House Learner's Dictionary of American English © 2025

ˈself-imˈpor•tant,  adj. 

1. having or showing too high an opinion of one's own importance:
   a self-important bureaucrat.

self--im•por•tance, n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2025

self-im•por•tant  (self′im pôr′tnt, self′-), adj. 

1. having or showing an exaggerated opinion of one's own importance;
   pompously conceited or haughty.

• 1765–75

self′-im•por′tance, n. 
self′-im•por′tant•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

self-important adjective

1. having or showing an unduly high opinion of one's own abilities, importance, etc

ˌself-imˈportantly adverb

ˌself-imˈportance noun