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alertadjective paying close attention usually for the purpose of anticipating approaching danger or opportunityshe needed to stay alert throughout the train ride so as not to miss her stop Argus-eyed, attentive, awake, observant, open-eyed, tenty(also tentie, Scottish), vigilant, watchful, wide-awake alive, aware, conscious, sensitivecognizant, heedful, keen, mindful, observing, regardful, sharp, sharp-eyedhyperalert, hypervigilant, sleepless, wakefulcareful, cautious, chary, waryprepared, ready on guard, on one's toes, on the alert, on the ball, on the qui vive, on tiptoe asleep absent, absentminded, absorbed, abstracted, daydreaming, dazed, distracted, dreaming, dreamy, engrossed, faraway, insensible, oblivious, preoccupiedsleeping, unaware, unconscious, unknowing, unwittingcareless, heedless, inattentive, unheeding, unmindful, unthinking, unwaryunprepared, unready having or showing a close attentiveness to avoiding danger or troublewarned us to be alert to the presence of pickpockets on the crowded bus careful, cautious, chary, circumspect, conservative, considerate, gingerly, guarded, heedful, safe, wary advertent, attentive, awake, observant, regardful, vigilant, watchfulhypercautiousforesighted, foresightful, forethoughtful, provident, thoughtfulcagey(also cagy), calculating, canny, shrewddeliberate, slowultracareful, ultracautious careless, heedless, incautious, unguarded, unmindful, unsafe, unwary bold, brash, impetuous, rash, reckless, venturesomeasleep, inattentive, regardlessinconsiderate, thoughtlesslax, neglectful, negligent, remissimprudent, indiscreet, injudiciousabsentminded, forgetfulinadvertent, unintentional, unplanned having or showing quickness of mindan alert and well-trained sheep dog who can handle difficult situations brainy, bright, brilliant, clever, exceptional, fast, hyperintelligent, intelligent, keen, nimble, quick, quick-witted, sharp, sharp-witted, smart, supersmart, ultrasmart apt, ingenious, resourcefulacute, astute, discerning, heady, insightful, knowing, perceptive, percipient, perspicacious, sagacious, sapient, savvy, wisecerebral, erudite, genial, highbrow, knowledgeable, learned, literate, scholarly, well-readeducated, informed, schooled, skilled, trainedcreative, inventive, judicious, prudent, sage, sane, sapient, sensible, sound, wisecrafty, cunning, foxy, shrewd, wilylogical, rational, reasonable airheaded, birdbrained, boneheaded, brain-dead, brainless, bubbleheaded, chuckleheaded, dense, dim, dim-witted, doltish, dopey(also dopy), dorky(slang), dull, dumb, dunderheaded, empty-headed, fatuous, gormless(chiefly British), half-witted, knuckleheaded, lamebrain(or lamebrained), lunkheaded, mindless, obtuse, opaque, pinheaded, senseless, simple, slow, slow-witted, soft, softheaded, stupid, thick, thickheaded, thick-witted, unbrilliant, unintelligent, unsmart, vacuous, weak-minded, witless feebleminded, simplemindedboobish, foolish, half-baked, idiotic(also idiotical), imbecile(or imbecilic), moronic, sillyignorant, illiterate, lowbrow, nonintellectual, unacademic, uneducated, uninformed, unintellectual, untaught, unthinkingabsurd, asinine, balmy, cockeyed, crackpot, crazy, cuckoo, daffy, daft, dippy, dotty, featherheaded, fool, half-baked, harebrained, insane, kooky(also kookie), loony(also looney), lunatic, mad, nonsensical, nutty, preposterous, sappy, screwball, tomfool, unwise, wacky(also whacky), zany having or showing the ability to respond without delay or hesitationan alert force of commandos, ready to go on a mission at a moment's notice alacritous, expeditious, prompt, quick, ready, willing receptive, responsiveimmediate, instant, instantaneous, summarybreakneck, breathless, brisk, fast, fleet, fleet-footed, hit-and-run, lightning, rapid, rapid-fire, rattling, snappy, speedy, swift, whirlwindeager, keen, sharpapt, clever, quick-witted, ready-witted, sharp-witted, smart unresponsivecrawling, creeping, dallying, dawdling, dilatory, dillydallying, dragging, laggard, lagging, lazy, lazyish, leisurely, logy(also loggy), poking, poky(or pokey), slothful, slow, slowish, sluggish, tardy, unhurrieddormant, idle, inactive, inert the act or an instance of telling beforehand of danger or riskthe white flash of the doe's raised tail, giving the "danger" alert to her fawns admonishment, admonition, alarm(also alarum), caution, forewarning, heads-up, notice, warning auguring, augury, forecasting, foretelling, predicting, prediction, premonition, presaging, prognosticating, prophecy(also prophesy), prophesyingapprising, informing, notification, notifying, tip-offadvice, counsel, guidance, recommendation, suggestion, tipannouncement, declaration the state of being constantly attentive and responsive to signs of opportunity, activity, or dangerthe doctor told the patient to be on the alert for any signs of infection alertness, attentiveness, qui vive, red alert, vigilance, watch, watchfulness aliveness, awareness, consciousness, mindfulness, receptiveness, receptivity, sensitivitycare, carefulness, cautiousness, chariness, heedfulness, warinesspreparation, readiness absentmindedness, abstraction, daydreaming, daze, distractionabsorption, engrossment, obliviousness, preoccupationunawareness, unconsciousnesscarelessness, heedlessness, inattention, inattentiveness, inobservanceunwariness to give notice to beforehand especially of danger or riskalerted us to the possibility that the roads would be flooded and we might have to take a detour advise, caution, forewarn, wake, warn augur, forecast, foretell, harbinger, predict, presage, prognosticate, prophesyapprise, inform, notify, tip (off)admonishbode, forebode(also forbode), foreshadow, foretoken, portend imperil, risk adj.watchful, vigilant, wide-awake, alert mean being on the lookout especially for danger or opportunity.watchful is the least explicit term.the watchful eye of the department supervisor vigilant suggests intense, unremitting, wary watchfulness.eternally vigilant in the safeguarding of democracy wide-awake applies to watchfulness for opportunities and developments more often than dangers.wide-awake companies latched onto the new technology alert stresses readiness or promptness in meeting danger or in seizing opportunity.alert traders anticipated the stock market's slide in 1618 |