academic quarter UK /ˌækəˈdɛmɪk ˈkwɔːtə(r/US /ˌækəˈdɛmɪk ˈkwɔrtər/ noun2 •The traditional fifteen-minutes discrepancy between the time a university lecture nominally will start (according to schedule) and the time it actually starts, used in some educational institutions. •A trimester. formsacademic quarters