self-importance

CIDE DICTIONARY

self-importance, n. 

 An exaggerated estimate of one's own importance or merit, esp. as manifested by the conduct or manners; self-conceit.  [1913 Webster]

OXFORD DICTIONARY

self-importance, n. a high opinion of oneself; pompousness.

Derivative

self-important adj. self-importantly adv.

THESAURUS

self-importance

accent, amour-propre, arrogance, assurance, assuredness, autoeroticism, belief, certitude, cocksureness, complacency, concern, concernment, confidence, confidentness, consequence, consequentiality, consideration, conviction, courage, ego trip, egoism, egotism, emphasis, excellence, faith, grandiloquence, high order, high rank, hubris, import, importance, inflation, interest, mark, materiality, merit, moment, narcism, narcissism, note, orotundity, overconfidence, overproudness, oversureness, overweening, overweening pride, overweeningness, paramountcy, poise, pomposity, pompousness, pontificality, pontification, positiveness, precedence, preeminence, pride, primacy, priority, security, self-admiration, self-approbation, self-assurance, self-complacency, self-confidence, self-congratulation, self-consequence, self-content, self-delight, self-endearment, self-esteem, self-gratulation, self-infatuation, self-love, self-reliance, self-respect, self-satisfaction, self-sufficiency, self-worship, settled belief, significance, smugness, stress, stuffiness, subjective certainty, superiority, supremacy, sureness, surety, trust, turgidity, vaingloriousness, vainglory, vainness, value, vanity, weight, worth