The Collaborative International Dictionary of English v.0.48:

Litterateur \Lit`te`ra`teur"\ (l[-e]`t[asl]`r[.a]`t[~e]r"), n.
   [F.]
   One who occupies himself with literature; a literary man; a
   literatus. " Befriended by one kind-hearted litt['e]rateur
   after another." --C. Kingsley.
   [1913 Webster]

WordNet (r) 3.0 (2006):

litterateur
    n 1: a writer of literary works [syn: essayist, litterateur]