Someone who has left an educationalinstitution without completing the courseThe politicians of the world are mere political university dropouts.
One who suddenly leaves anything, or the act of doing so.
2010, R. Barker Bausell, Too Simple to Fail: A Case for Educational Change (page 193)To avoid excessive dropouts from the study, we wouldn't employ a single tutored group and a single control group that received no instruction at all.