(Old Testament) Adam's wife in Judeo-Christian mythology: the first woman and mother of the human race; God created Eve from Adam's rib and placed Adam and Eve in the Garden of Eden
the day before;
"he always arrives on the eve of her departure"
the period immediately before something;
"on the eve of the French Revolution"
the latter part of the day (the period of decreasing daylight from late afternoon until nightfall);