Entry 2 senses Webster, 1913 Librarian /(lī̇*brā"rĭ*an)/ · Li·bra·ri·an · IPA /laɪˈbɹɛɹ.i.ən/ 01 n. One who has the care or charge of a library. 1. One who has the care or charge of a library. 2. One who copies manuscript books.[Obs.]