ˌone-night ˈstand noun [countable]

1. informal
a) an occasion when two people have sex, but do not meet each other again:
I’m not into one-night stands.
b) a person that you have sex with once and do not see again

2. a performance of music or a play that is given only once in a particular place

[TahlilGaran] Dictionary of Contemporary English ▲

one-night stand
1.
a sexual relationship which only lasts for one night, or a person who you have had this type of relationship with.
I'd rather have a long-term relationship than a series of one-night stands.

It's you I love, Karen - Debbie was just a one-night stand.

2.
a performance which happens only once in a particular place.
We're doing a one-night stand in Durham on Monday followed by a couple of nights in Newcastle.

[TahlilGaran] English Idioms Dictionary ▲

one night stand
n. phr.
1. A single performance given by a traveling company while on a tour.
After they went bankrupt in the big cities, the traveling jazz quartet played one-night stands in the country.
2. A brief affair or sexual encounter.
"With AIDS all around us?" said Jane. "Nobody is having one-night stands anymore."

[TahlilGaran] English Idioms Dictionary ▲