Webster's English Dictionary

Enter the word to look up:

folio

1. fo.lio \'fo--le--.o-\ n [ME, fr. L, abl. of folium] 1a: a leaf esp. of a 
   manuscript or book  1b: a leaf number  1c: a page number  1d: an 
   identifying reference in accounting used in posting  2a: a sheet of paper 
   folded once  2b: a case or folder for loose papers  3a: the size of a piece 
   of paper cut two from a sheet; also : paper  or a page of this size 3b: a 
   book printed on folio pages  3c: a book of the largest size  4: a certain 
   number of words taken as a unit or division in a document for  purposes of 
   measurement or reference
2. folio vt : to put a serial number on each leaf or page of