antiquarium UK /ˌan.tɪˈkwɛəɹi.əm/US /ˌan.təˈkwɛɹi.əm/ noun1 •A place for keeping antiques.[…] to make preparations for establishing an antiquarium in the nymphaeum under the right side-aisle of the Church (below Zone CC-DD-EE). — 1965 formsantiquaria