overnight
1. [ adverb ] happening in a short time or with great speed
Examples:

"these solutions cannot be found overnight!"

2. [ adjective ] lasting through or extending over the whole night
Synonyms: nightlong
Examples:

"a nightlong vigil" "an overnight trip"

Related terms: long
Similar spelling:   overnighter
  overanxiety
  overnice
  overrun
  Overman
  overanxious
  ovarian