25B6; noun
drunks were put in the lock-up overnight : JAIL, prison, cell, detention centre; N. Amer. jailhouse; informal slammer, jug, stir, clink; Brit. informal nick; N. Amer. informal cooler, can; Brit. informal, dated quod, chokey.
they stored spare furniture in a lock-up : STOREROOM, store, warehouse, depository; garage.