[ thee-uh-rahyz, theer-ahyz ]
/ ˈθi əˌraɪz, ˈθɪər aɪz /

verb (used without object), the·o·rized, the·o·riz·ing.

to form a theory or theories.

verb (used with object), the·o·rized, the·o·riz·ing.

to form a theory or theories about.

Nearby words

  1. theoretical arithmetic,
  2. theoretically,
  3. theoretician,
  4. theoretics,
  5. theorist,
  6. theory,
  7. theory of equations,
  8. theory of everything,
  9. theory of games,
  10. theory of mind

Also especially British, the·o·rise.

Origin of theorize

From the Medieval Latin word theōrizāre, dating back to 1630–40. See theory, -ize

Related formsthe·o·ri·za·tion, nounthe·o·riz·er, nouno·ver·the·o·ri·za·tion, nouno·ver·the·o·rize, verb (used without object), o·ver·the·o·rized, o·ver·the·o·riz·ing. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for theorization



/ (ˈθɪəˌraɪz) /


(intr) to produce or use theories; speculate
Derived Formstheorization or theorisation, nountheorizer or theoriser, noun

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

Word Origin and History for theorization



1630s, perhaps a formation in English from theory + -ize. Related: Theorized; theorizing.

Online Etymology Dictionary, © 2010 Douglas Harper