<p><strong>Adjective:</strong></p><ul><li>lacking ordinary quickness and keenness of mind; slow-witted.</li><li>characterized by or proceeding from mental dullness; foolish; senseless.</li><li>tediously boring, especially due to lack of meaning or sense; inane; pointless.</li><li>annoying or irritating; troublesome.</li><li>in a state of stupor; stupefied.</li><li>Slang: excellent; terrific.</li></ul><p><strong>Noun:</strong></p><ul><li>Informal: a stupid person.</li></ul>