adj. Paid as a professional but on a part-time basis.
adj. Like a professional but not as skilled or experienced, more than an amateur but lower than a full professional in quality.
n. A semiprofessional person.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an athlete who plays for pay on a part-time basis
Word Usage
"Such "semiprofessional" gaming would still likely emerge at the player level, with player datamining "rating" games for competition, and agreeing among themselves what's fair and unfair within the league."