dormant UK /ˈdɔːmənt/US /ˈdoɹmənt/adjective 3noun 1forms 1 adjective3 •Inactive, sleeping, asleep, suspended.Grass goes dormant during the winter, waiting for spring before it grows again.The bank account was dormant; there had been no transactions in months. •In a sleeping posture; distinguished from couchant. •Leaning. noun1 •A crossbeam or joist. formsdormants