Source : Webster's Revised Unabridged Dictionary (1913)

Noel \No"el\, n. [F. no["e]l, L. natalis birthday, fr. natalis
   natal. See {Natal}.]
   Same as {Nowel}.

Source : WordNet®

Noel
     n : period extending from Dec. 24 to Jan. 6 [syn: {Christmas}, {Christmastide},
          {Christmastime}, {Yule}, {Yuletide}]