–adverb

1.	for or during the night: to stay overnight.

2.	on or during the previous evening: Preparations were made overnight.

3.	very quickly; suddenly: New suburbs sprang up overnight.

–adjective

4.	done, made, occurring, or continuing during the night: an overnight stop; an overnight decision.

5.	staying for one night: a group of overnight guests.

6.	designed to be used on a trip or for a journey lasting one night or only a few nights.

7.	intended for delivery on the next day: overnight letters; an overnight package.

8.	valid for one night: The corporal got an overnight pass.

9.	occurring suddenly or within a very short time: a comedian who became an overnight sensation.

–noun

10.	Informal. an overnight stay or trip: Our daughter had an overnight at a friend's house.

11.	Informal. a permit for overnight absence, as from a college dormitory: She had an overnight the night of the prom.

12.	the previous evening.

–verb (used without object)

13.	to have an overnight stay or trip: We'll overnight in Denver, then fly on to San Diego.

–noun, plural -ma⋅ta  /-mətə/ Show Spelled Pronunciation [-muh-tuh] Show IPA Pronunciation , -mas. Biology.

the body of an organism as contrasted with its germ cells.