casual

1 not designed to be worn only on special occasions a restaurant where people in casual clothes are always welcome Synonyms everyday, informal, workaday Related Words dégagé, relaxed, sporty; dressed down; shabby, sloppy, slovenly, unkempt Near Antonyms best, Sunday; dressed up; chic, elegant, fashionable, smart, stylish; neat, tidy, trim; semiformal Antonyms dressy, formal, noncasual

2 happening by chance a casual meeting with the next-door neighbors on a beach in Hawaii Synonyms accidental, chance, fluky (also flukey), fortuitous, inadvertent, incidental, unintended, unintentional, unplanned, unpremeditated, unwittingRelated Words coincidental; freak, odd; aimless, arbitrary, desultory, haphazard, random; uncertain, unexpected, unforeseeable, unforeseen; coerced, forced, involuntary; unconscious, unpromptedNear Antonyms certain, destined, expected, fixed, foreordained, foreseeable, foreseen, inevitable, predestined, predetermined, predictable, preordained, prescribed, sure; conscious, freewill, knowing, unforced, voluntary, volunteer, willful (or wilful)Antonyms calculated, deliberate, intended, intentional, planned, premeditated, premeditative, prepense, set

3 having or showing a lack of interest or concern only a casual examination of the bicycle before buying it Synonyms apathetic, indifferent, complacent, 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

4 lacking in steadiness or regularity of occurrence a casual attendance at their son's hockey games Synonyms aperiodic, fitful, catchy, choppy, discontinuous, episodic (also episodical), erratic, intermittent, irregular, occasional, spasmodic, spastic, sporadic, spotty, unsteadyRelated Words convulsive, sudden, violent; broken, disconnected, fragmentary, interrupted; aimless, arbitrary, desultory, haphazard, hit-and-miss, hit-or-miss, odd, random, scattered, slapdash, stray; capricious, changeful, changing, flickery, fluctuating, fluid, inconstant, mercurial, mutable, temperamental, uncertain, unpredictable, unsettled, unstable, varying, wavering; changeable, fickle, variable, volatileNear Antonyms changeless, equable, even, stable, stationary, uniform; unchanging, unvarying, unwavering; methodical (also methodic), orderly, systematic; unrelenting, unremittingAntonyms constant, continuous, habitual, periodic, regular, repeated, steady