The Oxford Thesaurus An A-Z Dictionary of Synonyms - senseless adj.

1) insensible, unconscious, (knocked) out (cold) , stunned, insensate, comatose: Agatha's head hit the fire-grate and she was borne senseless to her room. 2) numb(ed) , insensate, unfeeling, benumbed, unfeeling, insensible, anaesthetized, dead, deadened, insentient: My feet are senseless from the cold. 3) pointless, purposeless, ridiculous, ludicrous, unintelligent, illogical, irrational, incongruous, meaningless, absurd, wild, mad, crazy, demented, insane, asinine, nonsensical, imbecilic or imbecile, idiotic, moronic, simple-minded, fatuous, stupid, foolish, silly, dizzy, halfwitted, mindless, brainless, witless, empty-headed, thimble-witted, pea-brained, bird-brained, hare-brained, feather-headed, rattle-brained, addle-pated, muddle-headed, Colloq daft, US daffy, nutty, batty, Slang wacky, dippy: Many of the government's objections to the plan are just senseless posturing. He is promoting some senseless plan for double-decker motorways.