slow to learn or understand; lacking intellectual acuity; so dense he never understands anything I say to him; never met anyone quite so dim; although dull at classical learning, at mathematics he was uncommonly quick- Thackeray; dumb officials make some really dumb decisions; he was either normally stupid or being deliberately obtuse; worked with the slow students

[ Syn: dense , dim , dull , obtuse , slow ]

temporarily incapable of speaking; struck dumb; speechless with shock

[ Syn: speechless ]

lacking the power of human speech; dumb animals'

unable to speak because of hereditary deafness

[ Syn: mute , silent ]