'Unintelligent' definitions:

Definition of 'unintelligent'

(from WordNet)
adjective
Lacking intelligence; "a dull job with lazy and unintelligent co-workers" [syn: unintelligent, stupid] [ant: intelligent]

Definition of 'Unintelligent'

From: GCIDE

Synonyms of 'unintelligent'

From: Moby Thesaurus