brainless

1. (not comparable) Having no brain.Examples: "Surely it was more likely that a brainless creature, acting solely by vague predatory instinct, would give up the chase when I disappeared, and, after a pause of astonishment, would wander away in search of some other prey?"Synonyms: anencephalousnot-comparable

2. (comparable) Unintelligent, with little common sense.Examples: ""I don't mean all of your friends—only a small proportion—which, however, connects your circle with that deadly, idle, brainless bunch—the insolent chatterers at the opera, the gorged dowagers, the worn-out, passionless men, the enervated matrons of the summer capital,[…]!""Synonyms: half-brained, half-witted, addlebrained, addlepated, airheaded, bee-brained, beef-witted, beefheadedAntonyms: brainycomparable

3. (of a thing done) Overly repetitive and unchallenging, not requiring any careful attention or providing any significant stimulation.Examples: "Near-synonyms: automatic, rote, dull"Synonyms: mindlessAntonyms: engrossing