† bibliothecarObs.Sc. Also mod., in Fr. form, bibliothecaire. [See bibliothecary n.and a.] A librarian. 1581N. Burne Dispot. 97 a (Jam.) Anastasius, bibliothecar of the Kirk of Rome.[1839D'Israeli Cur. Lit. (1866) 502/2 The bibliothecaire is too delightfully busied among his shelves.]