ˌsemi-proˈfessional BrE AmE , sem‧i‧pro‧fes‧sion‧al /ˌsemiprəˈfeʃ ə nəl◂/ ( also ˌsemi-ˈpro American English informal ) adjective
a semi-professional sports player, musician etc is paid for doing a sport, playing music etc, but does not do it as their main job:
a semiprofessional boxer
—semi-professional ( also semi-pro informal American English ) noun [countable]