The Collaborative International Dictionary of English v.0.48:
prioritize \prioritize\ v. t. To order or rank (a list of tasks) according to priority; to assign a priorities to. [WordNet 1.5]WordNet (r) 3.0 (2006):
prioritize v 1: assign a priority to; "we have too many things to do and must prioritize" [syn: prioritize, prioritise]