senseless

1 having lost consciousness she collapsed, senseless, after hitting her head Synonyms cold, insensible, unconsciousRelated Words semiconscious; anesthetized; collapsedNear Antonyms alert, awake, aware, up; resuscitated, revivedAntonyms conscious

2 having no meaning a pretty but senseless phrase Synonyms empty, inane, pointless, meaninglessRelated Words frivolous, inconsequential, inconsiderable, insignificant, little, minor, negligible, slight, trifling, trivial, unimportant; absurd, asinine, balmy, brainless, crackpot, crazy, cuckoo, daffy, daft, dotty, empty-headed, fatuous, foolish, half-witted, harebrained, insane, jerky, kooky (also kookie), loony (also looney), lunatic, mad, mindless, nonsensical, nutty, preposterous, sappy, silly, simpleminded, stupid, tomfool, unintelligent, unwise, wacky (also whacky), weak-minded, witless, zany; irrational, unreasonable; aimless, haphazard, purposelessNear Antonyms eloquent, expressive, pregnant, revealing, suggestive, telling; logical, rational, reasonable, valid; consequential, eventful, important, key, major, momentous, substantial, weightyAntonyms meaningful, significant

3 not having or showing an ability to absorb ideas readily he may be a little absentminded, but he's really not as senseless as he seems Synonyms airheaded, birdbrained, bonehead, 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, oafish, obtuse, opaque, pinheaded, stupid, simple, slow, slow-witted, soft, softheaded, thick, thickheaded, thick-witted, unintelligent, unsmart, vacuous, weak-minded, witlessRelated Words cretinous, feebleminded, simpleminded; boobish, foolish, idiotic (also idiotical), imbecile (or imbecilic), moronic; ignorant, illiterate, lowbrow, uneducated, uninformed, unintellectual, untaught, unthinking; absurd, 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, silly, tomfool, unwise, wacky (also whacky), zany; fallacious, illogical, invalid, irrational, unreasonableNear Antonyms ingenious, resourceful; acute, astute, discerning, insightful, keen, knowing, perceptive, percipient, perspicacious, sagacious, sage, sapient, savvy, wise; cerebral, erudite, highbrow, intellectual, knowledgeable, learned, literate, scholarly, thinking, well-read; educated, informed, schooled, skilled, trained; crafty, cunning, foxy, shrewd, wily; judicious, prudent, sane, sensible, sound; logical, rational, reasonable, validAntonyms apt, brainy, bright, brilliant, clever, fast, hyperintelligent, intelligent, keen, nimble, quick, quick-witted, sharp, sharp-witted, smart, supersmart, ultrasmart

4 showing or marked by a lack of good sense or judgment a senseless decision to risk his life on a practical joke Synonyms absurd, asinine, balmy, brainless, bubbleheaded, cockeyed, crackpot, crazy, cuckoo, daffy, daft, dippy, dotty, fatuous, featherheaded, fool, half-baked, harebrained, half-witted, inept, insane, jerky, kooky (also kookie), loony (also looney), lunatic, lunkheaded, mad, nonsensical, nutty, preposterous, sappy, screwball, foolish, silly, simpleminded, stupid, tomfool, unwise, wacky (also whacky), weak-minded, witless, zanyRelated Words airheaded, birdbrained, boobish, brain-dead, chowderheaded, chuckleheaded, clueless, dense, dim, dim-witted, doltish, dopey (also dopy), dorky [slang], dull, dumb, dunderheaded, empty-headed, fatuous, feebleminded, gormless [chiefly British], idiotic (also idiotical), imbecile (or imbecilic), knuckleheaded, lamebrain (or lamebrained), mindless, moronic, oafish, obtuse, opaque, pinheaded, simple, slow, slow-witted, soft, softheaded, thoughtless, thick, thickheaded, unintelligent, vacuous, witless; fallacious, illogical, invalid, irrational, nonrational, surd, unreasonable, unreasoning, unsound, weak; farcical, laughable, ludicrous, ridiculous; notional; buffoonish, clownish; ill-advised, unconsidered, unreasonedNear Antonyms brainy, bright, clever, intelligent, smart; logical, rational, reasonable, valid; well-advisedAntonyms judicious, prudent, sagacious, sage, sane, sapient, sensible, sound, wise

5 lacking animate awareness or sensation even the senseless sea seemed determined to swamp the storm-tossed ship Synonyms inanimate, insensible, insentient, insensate, unfeelingRelated Words exanimate, lifeless; comatose, unconsciousNear Antonyms aware, cognizant, conscious; animated, lively, vibrantAntonyms animate, feeling, sensate, sensible, sensitive, sentient