Emily Dickinson Lexicon

Christmas, proper adj. [see Christmas, proper n.] (webplay: day).

1. Holiday; seasonal; familial; relating to the celebration of Christ's birth; [fig.] childlike; idyllic; pleasing in a simple way.
2. Phrase. “Christmas tree”: evergreen plant decorated with lights and ornaments to commemorate the birth of the Son of God; [metonymy] winter holiday in December.