complacent

1 having or showing a lack of interest or concern the auditors were taken aback by his complacent response to their findings of fraud Synonyms apathetic, casual, indifferent, disinterested, incurious, insensible, insouciant, nonchalant, perfunctory, pococurante, unconcerned, uncurious, uninterestedRelated Words halfhearted, lukewarm, tepid; aloof, cold, numb, remote, unemotional; callous, hard-hearted, insensitive, unfeeling; calm, cool, detached, dispassionate; careless, heedless, mindless; impassive, impervious, phlegmatic, stoic (or stoical), stolid; lethargic, listless; unimpressedNear Antonyms attentive, aware, conscientious, heedful, mindful; caring, sensitive, warmhearted; ardent, fervent, keen, passionate, warm, zealousAntonyms concerned, interested

2 having too high an opinion of oneself a complacent junior exec who was certain of his indispensability to the company Synonyms assured, biggety (or biggity) [Southern & Midland], bigheaded, conceited, consequential, egoistic (also egoistical), egotistic (or egotistical), important, overweening, pompous, prideful, proud, self-conceited, self-important, self-opinionated, self-satisfied, smug, stuck-up, swellheaded, vain, vaingloriousRelated Words blusterous, blustery, boastful, bombastic, braggart, bragging, braggy, cocky, swaggering; arrogant, assumptive, bumptious, cavalier, chesty, disdainful, fastuous, haughty, high-and-mighty, high-hat, huffy, lofty, lordly, masterful, peremptory, pontifical, self-asserting, self-assertive, snobbish, snobby, snooty, supercilious, superior, toplofty (also toploftical), uppish, uppity; domineering, high-handed, imperious; highfalutin (also hifalutin), holier-than-thou, pretentious; overconfident, presuming, presumptuous; confident, self-assured, self-confident; self-adulatory, self-congratulatory, self-contented, self-gratulatory; self-applauding, self-dramatizing, self-glorifying, self-promoting; self-affected, self-centered, self-engrossed, selfish; condescending, patronizingNear Antonyms diffident, self-critical, self-distrustful, self-doubting, self-reproachful, self-reproving; meek, timid, unassertive; down-to-earth, unarrogant, unassuming, unpretentious; bashful, demure, introverted, mousy (or mousey), overmodest, retiring, sheepish, shrinking, shyAntonyms egoless, humble, modest, uncomplacent