Economize \E*con"o*mize\, v. t. [imp. & p. p. {Economized}; p. pr. & vb. n. {Economizing}.] [Cf. F. ['e]conomiser.] To manage with economy; to use with prudence; to expend with frugality; as, to economize one's income. [Written also {economise}.] Expenses in the city were to be economized. --Jowett (Thucyd. ). Calculating how to economize time. --W. Irving.