Synonyms: mental retardation, slowness, subnormality, retardation, backwardness
Definition: lack of normal development of intellectual capacities
Similar words: stupidity
Definition: a poor ability to understand or to profit from experience
Synonyms: subnormality
Definition: the state of being less than normal (especially with respect to intelligence)
Similar words: abnormalcy, abnormality
Definition: an abnormal physical condition resulting from defective genes or developmental deficiencies