Principle \Prin"ci*ple\, v. t. [imp. & p. p. {Principled}; p. pr. & vb. n. {Principling}.] To equip with principles; to establish, or fix, in certain principles; to impress with any tenet, or rule of conduct, good or ill. Governors should be well principled. --L'Estrange. Let an enthusiast be principled that he or his teacher is inspired. --Locke.