sedate

1 not joking or playful in mood or manner while not exactly cold, the doctor does maintain a sedate and purely professional demeanor with his patients Synonyms earnest, grave, humorless, no-nonsense, po-faced [British], serious, severe, sober, sobersided, solemn, staid, uncomic, unsmiling, weightyRelated Words harsh, stern, strict; businesslike, professional; dignified, distinguished, elevated, serious-minded; gloomy, grimNear Antonyms antic, comic, comical, droll, farcical, funny, hilarious, hysterical (also hysteric), laughable, light, light-headed, ludicrous, ridiculous, riotous, risible, screaming, sidesplitting, uproarious; featherbrained, flighty, frivolous, goofy, harebrained, lighthearted, puerile, scatterbrained; absurd, asinine, balmy, brainless, cockeyed, crazy, cuckoo, daffy, daft, dotty, fatuous, foolish, half-witted, insane, jerky, kooky (also kookie), loony (also looney), lunatic, mad, nonsensical, nutty, preposterous, sappy, screwball, senseless, silly, unwise, wacky (also whacky), weak-minded, witless, zanyAntonyms facetious, flip, flippant, humorous, jesting, jocular, joking, kittenish, ludic, playful

2 free from emotional or mental agitation her expression remained sedate as I told her the bad news Synonyms collected, composed, cool, coolheaded, equal, level, limpid, peaceful, placid, possessed, recollected, calm, self-composed, self-possessed, serene, smooth, together, tranquil, undisturbed, unperturbed, unruffled, unshaken, untroubled, unworriedRelated Words even, even-keeled, steady, well-adjusted, well-balanced; imperturbable, nerveless, unflappable, unshakable; centered, disciplined, equable, self-contained, self-controlled; affable, breezy, devil-may-care, easygoing, happy-go-lucky, laid-back, loosey-goosey, mellow; carefree, nonchalant, unconcerned; assured, confident, self-assured; aloof, detached, dispassionate, indifferent; bovine, impassive, phlegmatic, sober, stolid; relaxed, relieved, tranquilized (also tranquillized)Near Antonyms anxious, bothered, distressed, uneasy, unquiet, unsettled, worried; jittery, jumpy, nervous, restless, skittish, tense; high-strung, unstable, uptightAntonyms agitated, discomposed, disturbed, flustered, perturbed, unglued, unhinged, unstrung, upset