verb (used without object), su·bi·tized, su·bi·tiz·ing. Psychology.

to perceive at a glance the number of items presented, the limit for humans being about seven.

Nearby words

  1. subinfeudatory,
  2. subinfluent,
  3. subinterval,
  4. subinvolution,
  5. subirrigate,
  6. subito,
  7. subj.,
  8. subjacent,
  9. subject,
  10. subject catalog

Also especially British, su·bi·tise.

Origin of subitize

1949; < Latin subit(us) sudden or Late Latin subit(āre) to appear suddenly (see subito) + -ize Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for subitise




psychol to perceive the number of (a group of items) at a glance and without countingthe maximum number of items that can be subitized is about five

Word Origin for subitize

C20: from Latin subitus sudden + -ize

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