The Collaborative International Dictionary of English v.0.48:
non-involvement \non-involvement\ n. withdrawing from the activities of a group. Syn: non-engagement, nonparticipation. [WordNet 1.5]WordNet (r) 3.0 (2006):
non-involvement n 1: withdrawing from the activities of a group [syn: non- engagement, nonparticipation, non-involvement] [ant: engagement, involution, involvement, participation]