The Collaborative International Dictionary of English v.0.48:
Authorial \Au*tho"ri*al\, a. Of or pertaining to an author. "The authorial ?we.'" --Hare. [1913 Webster]WordNet (r) 3.0 (2006):
authorial adj 1: of or by or typical of an author; "authorial comments"; "auctorial flights of imagination" [syn: authorial, auctorial]