Also found in: Thesaurus.
Switch to new thesaurus
|Noun||1.||mental defectiveness - retardation sufficient to fall outside the normal range of intelligence|
backwardness, mental retardation, subnormality, slowness, retardation - lack of normal development of intellectual capacities
feeblemindedness - severe mental deficiency
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.