Not possessing or not proceeding from intelligence.
Not knowing; not having acute mental faculties; not showing intelligence; dull.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. lacking intelligence
Word Usage
"It is the rose's department; let the rose attend to it -- and be dubbed unintelligent because it baffles us by the miracles it works, and the unconcerned businesslike way in which it works them."