l or, especially Brit., -seel]
| 1. | Psychology. a person of the second order in a former classification of mental retardation, above the level of idiocy, having a mental age of seven or eight years and an intelligence quotient of 25 to 50. |
| 2. | a dunce; blockhead; dolt. |
| 3. | mentally feeble. |
| 4. | showing mental feebleness or incapacity. |
| 5. | stupid; silly; absurd. |
| 6. | Archaic. weak or feeble. |
imbecile im·be·cile (ĭm'bə-sĭl, -səl)
n.
A person of moderate to severe mental retardation having a mental age of from three to seven years and generally being capable of some degree of communication and performance of simple tasks under supervision. The term belongs to a classification system no longer in use and is now considered offensive.