Etymology: Middle French stupide, from Latin stupidus, from stupēre to be numb, be astonished — more at type
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 stupid from the sedative> 3. marked by or resulting from unreasoned thinking or acting ; senseless <a stupid decision> 4. a. lacking interest or point <a stupid event> b. vexatious, exasperating <the stupid car won't start> • stupidly adverb • stupidness noun Synonyms: 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>. II. noun Date: 1712 a stupid person
New Collegiate Dictionary. 2001.