mental deficiency

1. 1.

   mild mental retardation

   Synonymsmoronity

   Broaderretardation

Questions about mental deficiency

What does mental deficiency mean?

mental deficiency means "mild mental retardation".

What is another word for mental deficiency?

Close synonyms include moronity. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is mental deficiency a common word?

mental deficiency is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.