[stu.pid] adj [MF stupide, fr. L stupidus, fr. stupere to be numb, be astonished--more at type] (1541) 1 a: slow of mind: obtuse b: given to unintelligent decisions or acts: acting in an unintelligent or careless manner c: lacking intelligence or reason: brutish
2: dulled in feeling or sensation: torpid "still ~ from the sedative"
3: marked by or resulting from unreasoned thinking or acting: senseless
4. a: lacking interest or point b: vexatious, exasperating "this ~ flashlight won't work" -- stu.pid.ly adv -- stu.pid.ness n syn stupid, dull, dense, crass, dumb mean lacking in power to absorb ideas or impressions. stupid implies a slow-witted or dazed state of mind that may be either congenital or temporary "stupid students just keeping the seats warm" "stupid with drink". dull suggests a slow or sluggish mind such as results from disease, depression, or shock "monotonous work that leaves the mind dull". dense implies a thickheaded imperviousness to ideas "too dense to take a hint". crass suggests a grossness of mind precluding discrimination or delicacy "a crass, materialistic people". dumb applies to an exasperating obtuseness or lack of comprehension "too dumb to figure out what's going on".
[2]stupid n (1712): a stupid person