pn A widely celebrated festival commemorating the birth of Jesus Christ, incorporating various Christian, pre-Christian and secular customs.
n Christmastide, the Twelve Days of Christmas, the season (traditionally from the 24th of December to the 6th of January) around the holiday.
n (US|retailing) The period from the Friday following Thanksgiving to Christmas Eve, busy with shopping and preparations for Christmas.
n (marketing|retailing) Christmas season, the end of the year period, busy with shopping and preparations for Christmas.