THEORIZE Meaning of THEORIZE in English [the.o.rize] vb -rized ; -riz.ing vi (1638): to form a theory: speculate ~ vt 1: to form a theory about 2: to propose as a theory -- the.o.ri.za.tion n -- the.o.riz.er n Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012