Stupid (4)

'stupid' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for crass that I've seen before include "Unrefined" , "Witless" , "Asinine" , "Boorish about scars" , "'Gross, vulgar (5)'" .)
(Other definitions for inane that I've seen before include "unimaginitive" , "Silly or senseless" , "Thick" , "Devoid of intelligence" , "Empty-headed" .)
'stupid' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for apish that I've seen before include "Stupid" , "Foppish" , "Silly" , "Foolish; like a monkey" , "Foolish; simian" .)
'stupid?' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for clueless that I've seen before include "not like our solvers!" , "Ignorant (informal)" , "Ignorant; helpless" , "sort of crossword that nobody can solve?" , "Completely at sea about what's going on" .)
'stupid?' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for gormless that I've seen before include "Foolish, stupid" , "Slow" , "Lacking the sense one was born with" , "Lacking initiative/sense" , "Stupid (slang)" .)
'stupid?' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for mindless that I've seen before include "without reason" , "Without thought or care" , "Silly" , "Stupid" , "Irrational" .)
'stupid' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for idiotic that I've seen before include "Fatuous" , "Ridiculous" , "Mindless" , "description of Dostoevsky hero?" , "Altogether nonsensical" .)
'stupid' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for asinine that I've seen before include "Stubborn" , "In the nature of supposedly stupid animal" , "Silly like a donkey" , "Foolish, silly" , "Senseless" .)
(Other definitions for moronic that I've seen before include "Foolish" , "Mindless" , "ROM coin (anag.)" , "Omicron (anag) - stupid" , "really stupid" .)
'stupid' is the definition.
(synonyms)
This is all the clue.
(Other definitions for foolish that I've seen before include "Idiotic" , "Silly, lacking common sense" , "Absurd, not sensible" , "Silly, unwise" , "Imprudent" .)
'stupid' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for witless that I've seen before include "Daft" , "Out of one's mind (maybe scared)" , "Lacking sense, understanding or judgment" , "Foolish, stupid" .)
'stupid' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tomfool that I've seen before include "idiot" , "Joker" , "Daft" , "stupid" , "Silly person" .)
'stupid' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for fatuous that I've seen before include "Foolish or stupid" , "Absurd" , "Witless" , "Absurdly stupid" , "Asinine" .)
(Other definitions for dull that I've seen before include "Lacking variety" , "Not bright or shiny" , "Constable?" , "Cloudy or boring" , "Monotonous" .)
'stupid' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for daft that I've seen before include "Informally silly or crazy" , "like a brush?" , "Idiotic" , "Potty" , "Informally crazy as a brush" .)
'stupid' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for dumb that I've seen before include "Not able to speak" , "Mute" , "Thick" , "Ignorant (US colloq.); speechless" , "Lacking intellectual acuity" .)
'stupid' is the definition.
(I know that stupid can be written as unintelligent)
This is the entire clue.
(Other definitions for unintelligent that I've seen before include "Foolish" , "Stupid" , "Gormless" , "Lacking wit" .)
'stupid' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for senseless that I've seen before include "unable to hear, perhaps?" , "Illogical; stupid" , "Not marked by the use of reason" , "Unconscious; stupid" , "Inane" .)
'stupid' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for brainless that I've seen before include "Stupid, foolish" , "dim" , "Devoid of intelligence" , "Silly" .)
'stupid' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for obtuse that I've seen before include "Angles could be" , "Slow of understanding" , "Insensitive - more than a right angle" , "Can't quite see the angle" , "Not very perceptive or sensitive" .)