[ 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.
Also especially British, the·o·rise.

Origin of theorize

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

Related forms

the·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

Examples from the Web for theorise

British Dictionary definitions for theorise



/ (ˈθɪəˌraɪz) /


(intr) to produce or use theories; speculate

Derived Forms

theorization 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