#1 advent n. [coming] arrival that has been awaited (especially of something momentous); "the advent of the computer". wn #2 advent n. [Advent] the season including the four Sundays preceding Christmas. wn #3 advent n. [Second Coming, Second Coming of Christ, Second Advent, Advent, Parousia] (Christian theology) the reappearance of Jesus as judge for the Last Judgment. wn