nonlibrary adjective 1noun 1forms 1 adjective1 •Not of or pertaining to a library. noun1 •A place or institution other than a library.Two of the longest average visit lengths belonged to nonlibraries. The tours to the binderies and to the printers and publishers lasted on the average of 1.45 and 1.71 hours respectively. — 1996 formsnonlibraries