subnormal(n = noun.person) - a person of less than normal intelligence;
is a kind of simple, simpleton
Derived form adjective subnormal1
subnormal(s = adj.all) - below normal or average; "after the floods the harvests were subnormal"; "subnormal intelligence"
Derived forms noun subnormal1, noun subnormality2, noun subnormality1
That part of the axis of a curved line which is intercepted between the ordinate and the normal. [1913 Webster]
subnormal, adj.
1 (esp. as regards intelligence) below normal.
2 less than normal.
Derivative:
subnormality n.