Overnight \O"ver*night"\, adv. 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 Revised Unabridged Dictionary (1913)
 

Overnight \O"ver*night`\, n. The fore part of the night last past; the previous evening. [R.]

--Shak.

Source: Webster's Revised Unabridged Dictionary (1913)