"important arrival," 1742, an extended sense of Advent
"season before Christmas" (O.E.), from L. adventus
"arrival," from pp. stem of advenire
"arrive, come to," from ad-
"to" + venire
"to come" (see venue
). Applied in Church L. to the coming of the Savior, either the first or the anticipated second, hence Adventist,
a name applied to millenarian sects, esp. the Millerites (U.S., 1843). In Eng., also sometimes extended to the Pentecost.