OVERNIGHT
nightlong, all-night, overnight
(adjective) lasting, open, or operating through the whole night; “a nightlong vigil”; “an all-night drugstore”; “an overnight trip”
overnight
(adverb) during or for the length of one night; “the fish marinates overnight”
overnight
(adverb) happening in a short time or with great speed; “these solutions cannot be found overnight!”
Source: WordNet® 3.1
Etymology
Adverb
overnight (not comparable)
During or throughout the night, especially during the evening or night just past.
(figurative) In a very short (but unspecified) amount of time.
Adjective
overnight (not comparable)
Occurring between dusk and dawn.
Complete before the next morning.
Of an activity or event in which participants stay overnight.
Verb
overnight (third-person singular simple present overnights, present participle overnighting, simple past and past participle overnighted)
(intransitive) To stay overnight; to spend the night. [from 19th c.]
(transitive, US) To send something for delivery the next day. [from 20th c.]
Noun
overnight (plural overnights)
Items delivered or completed overnight.
An overnight stay, especially in a hotel or other lodging facility.
(television, in the plural) Viewership ratings for a television show that are published the morning after it is broadcast, and may be revised later on.
(obsolete) The fore part of the previous night; yesterday evening.
Source: Wiktionary
O"ver*night`, n.
Definition: The fore part of the night last past; the previous evening.
[R.] Shak.
O"ver*night", adv.
Definition: In the fore part of the night last past; in the evening before;
also, during the night; as, the candle will not last overnight.
I had been telling her all that happened overnight. Dickens.
Source: Webster’s Unabridged Dictionary 1913 Edition