adj. mentally deficient

adj. lacking mental capacity and devoid of subtlety

adj. 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"

adj. relatively slow in mental or emotional or physical development; "providing a secure and sometimes happy life for the retarded"

adj. mentally or physically infirm with age; "his mother was doddering and frail"

adj. not moving quickly; taking a comparatively long time; "a slow walker"; "the slow lane of traffic"; "her steps were slow"; "he was slow in reacting to the news"; "slow but steady growth"

adj. 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"

adj. not using intelligence

adj. not moving quickly; taking a comparatively long time; "a slow walker"; "the slow lane of traffic"; "her steps were slow"; "he was slow in reacting to the news"; "slow but steady growth"

adj. devoid of intelligence

adj. not using intelligence

adj. having a mental age of three to seven years

adj. having a mental age of between eight and twelve years

adj. retarded in intellectual development

adj. afflicted with cretinism