1. The coming or arrival of something or someone that is important or worthy of note: the advent of the computer.
2. Advent Christianity
a. The liturgical period preceding Christmas, beginning in Western churches on the fourth Sunday before Christmas and in Eastern churches in mid-November, and observed by many Christians as a season of prayer, fasting, and penitence.
b. The coming of Jesus at the Incarnation.
c. See Second Coming.
[Middle English, the Advent season, from Old French, from Latin adventus, arrival, from past participle of advenīre, to come to : ad-, ad- + venīre, to come; see gwā- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.