| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | attentive, lively |
| Synonyms: | active, all ears, bright, cagey, careful, circumspect, clever, fast on the draw, good hands, heads up, heedful, hip, intelligent, jazzed, observant, on guard, on one's toes, on the ball, on the job, on the lookout, on the qui vive, perceptive, psyched up, quick, ready, sharp, spirited, switched on, vigilant, wary, watchful, wide-awake, wired, wise, with it |
| Antonyms: | asleep, drowsy, inattentive, lethargic, sluggish, unobservant, weary |
| Main Entry: | mindful |
| Part of Speech: | adjective |
| Definition: | attentive, aware |
| Synonyms: | alert, alive to, apprehensive, au courant, be up on, cagey, careful, cautious, chary, cognizant, conscientious, conscious, conversant, heedful, in the know, know all the answers, know ins and outs, knowing, knowledgeable, observant, observative, observing, on one's toes, on the ball, on the job, on to, plugged in, regardful, respectful, sensible, solicitous, thoughtful, tuned in, vigilant, wary, watchful, with eyes peeled |
| Antonyms: | absent-minded, careless, heedless, inattentive, unaware |
| Main Entry: | observant |
| Part of Speech: | adjective |
| Definition: | alert, watchful |
| Synonyms: | advertent, alive, attentive, bright, clear-sighted, comprehending, considering, contemplating, correct, deducing, detecting, discerning, discovering, discriminating, eager, eagle-eyed, heedful, intelligent, intentive, interested, keen, mindful, not missing a trick, obedient, observative, on one's toes, on the ball, penetrating, perceptive, questioning, quick, regardful, searching, sensitive, sharp, sharp-eyed, surveying, understanding, vigilant, wide-awake |
| Antonyms: | careless, inattentive, indifferent, thoughtless, unaware, unmindful, unobservant, unwatchful |
| Main Entry: | on the ball |
| Part of Speech: | adjective |
| Definition: | alert |
| Synonyms: | active, all ears, attentive, bright, cagey, careful, clever, good hands, heads up, intelligent, lively, observant, on guard, on one's toes, on the job, on the lookout, on the stick, perceptive, quick, ready, sharp, spirited, vigilant, watchful, wise, with it |
| Main Entry: | watchful |
| Part of Speech: | adjective |
| Definition: | on the lookout |
| Synonyms: | alert, all ears, attentive, careful, cautious, chary, circumspect, glued, guarded, heedful, hooked, keen, not missing a trick, observant, on guard, on one's toes, on the ball, on the job, on the qui vive, on the watch, open-eyed, prepared, ready, see after, see to, suspicious, unsleeping, vigilant, wakeful, wary, wide-awake, with eyes peeled |
| Antonyms: | inattentive, negligent |
| Main Entry: | wide-awake |
| Part of Speech: | adjective |
| Definition: | fully awake |
| Synonyms: | active, alert, all ears, attentive, bright, bright-eyed and bushy-tailed, bright-eyed and bushy-tailed, fast on the draw, heads up, intelligent, lively, on guard, on one's toes, on one's toes, on the ball, on the ball, on the job, on the lookout, psyched up, quick, ready, sharp, spirited, vigilant, watchful, wide-eyed, wired |
| Main Entry: | on guard |
| Part of Speech: | adverb |
| Definition: | feeling wary |
| Synonyms: | alert, careful, cautious, defensive, guarded, heedful, mindful, observant, on one's guard, on one's toes, on the lookout, on the watch, vigilant, wary, watchful |
| Main Entry: | on the ball |
| Part of Speech: | adverb |
| Definition: | paying attention |
| Synonyms: | alert, alive, attentive, awake, on one's toes, on the job, on top of, ready, sharp, vital, wide-awake, with it |
| Main Entry: | on one's guard |
| Part of Speech: | adjective |
| Definition: | wary |
| Synonyms: | alert, careful, cautious, defensive, guarded, heedful, mindful, observant, on guard, on one's toes, on the lookout, on the watch, upon one's guard, vigilant, watchful |