What does "lock-in" mean?

A sleepover party, usually held in a public place such as a church or school, in which the participants are not allowed to leave until the next morning.

What is a synonym for "lock-in"?

Common synonyms include: wake-over, wakeover.

Lock-in

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
A sleepover party, usually held in a public place such as a church or school, in which the participants are not allowed to leave until the next morning. US
"The youth group will have their annual lock-in this weekend."
2
An illegal but widely-tolerated invitation-only gathering in a British pub, after the end of licensing hours, to allow regular customers the opportunity to enjoy further drinking time. Ireland, UK
"He was a lunatic drunk and started sing songs that lasted into the early hours of the morning and resulted in many weekend lock-ins in the village pub."
3
A situation in which members of an industry have agreed to adopt a certain standard and have retooled their production to meet this standard, thus making it very costly to change to a different standard.
"vendor lock-in"
4
The situation where an investor cannot trade without incurring an undesirable penalty such as taxation.