[ suhb-nawr-muh l ]
/ sʌbˈnɔr məl /


below the normal; less than or inferior to the normal: a subnormal amount of rain.
being less than average in any psychological trait, as intelligence, personality, or emotional adjustment.


a subnormal person.
Geometry. that part of the x-axis of a curve cut off between the ordinate and a normal.

Origin of subnormal

First recorded in 1700–10; sub- + normal

Related forms

sub·nor·mal·i·ty, noun

Can be confused

abnormal subnormal Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for subnormal

British Dictionary definitions for subnormal


/ (sʌbˈnɔːməl) /


less than the normal
having a low intelligence, esp having an IQ of less than 70


a subnormal person

Derived Forms

subnormality (ˌsʌbnɔːˈmælɪtɪ), nounsubnormally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012