Source : Webster's Revised Unabridged Dictionary (1913)

Yuletide \Yule"tide`\, n.
   Christmas time; Christmastide; the season of Christmas.

Source : WordNet®

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