Definitions for: Subnormal

[n] a person of less than normal intelligence
[adj] (statistics) below normal or average; "after the floods the harvests were subnormal"; "subnormal intelligence"

Webster (1913) Definition: Sub*nor"mal, n. (Geom.)
That part of the axis of a curved line which is intercepted
between the ordinate and the normal.

Synonyms: abnormal

See Also: simple, simpleton