eve /iːv/ BrE AmE noun
[ Date: 1100-1200 ; Origin: even 'evening' (11-21 centuries) , from Old English æfen ; ⇨ ↑ evening ]
1 . [countable usually singular] the night or day before an important day
eve of
on the eve of the election
We’re arriving on Christmas Eve.
a New Year’s Eve party
2 . [countable] literary evening:
one summer’s eve