- mindless
- adj1. senseless, nonsensical, insensate, brainless, witless, empty-headed, Brit. Inf. gormless, Rare. insulse; unintelligent, dull, dull-witted, dim-witted, slow, slow-witted, half-witted, weak-minded, weak-headed, feeble-minded, retarded, imbecilic, Inf. dopey, Inf. dill, Inf. moronic, Inf. dumb, Inf. cretinous, Sl. lamebrained; bird-brained, harebrained, simple-minded, simple, featherbrained, feath-erheaded, light-headed, foolish, silly, absurd, half-baked, inane, asinine, anserine, fatuous, fatuitous, idiotic, idiotical, Inf. damfool; scatterbrained, rattleheaded, rattlebrained, addleheaded, addlebrained, ad-dlepated, muddleheaded; irrational, illogical, unreasonable, unreasoning; mentally unsound or unstable, demented, insane, out of one's mind, crackbrained, mad, crazy, Sl. cockeyed, Sl. cuckoo, Sl. nuts.2. inattentive, heedless, unheeding, unobservant, unnoticing, regardless, inadvertent, blind, deaf; musing, wandering, distracted, daydreaming, engrossed or lost in thought or reverie, off in a world of one's own, a million miles away, faraway, Fr. distrait.3. careless, unmindful, unwary, unwatchful, unvigi-lant, unguarded, off guard, caught napping, Inf. asleep on the job, Inf. not on the job, Inf. asleep at the switch or wheel; improvident, unprepared, unready, short-sighted, negligent, neglectful, remiss; imprudent, indescreet, ill-considered, unwise, ill-advised, inconsiderate, thoughtless, unthinking; precipitate, rash, impulsive, headlong, reckless, foolhardy, irresponsible.
A Note on the Style of the synonym finder. 2014.