I. | ̷ ̷ ̷ ̷| ̷ ̷ adverb
Etymology: Middle English over night, from over (II) + night, n.
1.
a. : in the evening before
trying to tell a good story he heard overnight — O.S.J.Gogarty
b. : in the interval between two days
allowing the coarser particles to settle out … overnight — Journal of Infectious Diseases
c. : during the night : till the following morning
stayed with friends overnight
2. : with great or extreme speed or suddenness : very quickly or suddenly : all of a sudden
sprang up overnight in answer to a labor need — American Guide Series: Maine
no such perfected technique is born overnight — L.H.Appleton
II. ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷, ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷ noun
: the fore part of the night last past : the previous evening
his emotional rapture of the overnight — George Meredith
III. | ̷ ̷ ̷ ̷| ̷ ̷ adjective
1.
a. : of, relating to, or resulting from the previous evening : done or lasting during the night
an overnight carouse
overnight laughter is a commodity that I … am always ready to buy — Robert Hatch
b. : being of the duration of one night
an overnight stop
: staying one night
overnight guests
2. : happening or appearing overnight
became an overnight sensation — American Guide Series: Ind.
IV. intransitive verb
: to stay overnight
overnighted at the official presidential residence — Wilkes-Barre (Pa.) Record
V. noun
: an overnight stay
VI. verb
transitive verb
: to send via an overnight delivery service