An eve is the day — or night — just before some event. You might call the day before your birthday your "birthday eve."

Some holidays are well-known for having the proceeding days distinguished as eves: many of us celebrate New Year's Eve, others gather for meals on Christmas Eve or Passover Eve, and the word "Halloween" comes from "All Hallow's Eve." The word eve is sometimes also a shortened form of evening, the last part of the day: "It stays light so late on a summer's eve."

Definitions of eve

n the day before

“he always arrives on the eve of her departure”
Type of:
24-hour interval, day, mean solar day, solar day, twenty-four hour period, twenty-four hours
time for Earth to make a complete rotation on its axis

n the period immediately before something

“on the eve of the French Revolution”
Type of:
period, period of time, time period
an amount of time

n the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)

even, evening, eventide
guest night
an evening when members of a club or college can bring their friends as guests
Type of:
day, daylight, daytime
the time after sunrise and before sunset while it is light outside

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