vac

Từ điển Oxford Advanced Learner 8th

vac [vac vacs] BrE [væk] NAmE [væk] noun (BrE, informal)
a university vacation
•the Christmas/Easter/summer vac
•He spent the long vac (= the summer vacation) working at the local hospital.

Example Bank:
•I spent the long vac helping out at a local hospital.