advent

(noun) arrival that has been awaited (especially of something momentous). Synonyms: coming. Example: "The advent of the computer."

(noun) the season including the four Sundays preceding Christmas. Synonyms: Advent.

(noun) (Christian theology) the reappearance of Jesus as judge for the Last Judgment. Synonyms: Second Coming, Second Coming of Christ, Second Advent, Advent, Parousia.