The Collaborative International Dictionary of English v.0.48:
interiorise \interiorise\ v. t. (psychology) to incorporate within oneself; same as interiorize. [Chiefly Brit.] Syn: internalize, internalise, interiorize. [WordNet 1.5]WordNet (r) 3.0 (2006):
interiorise v 1: incorporate within oneself; make subjective or personal; "internalize a belief" [syn: internalize, internalise, interiorize, interiorise]