Curfew

noun

1. Any regulation requiring people to be off the streets and in their homes by a certain time.
2. The time when such restriction begins.
3. A signal indicating this time.
4. A fireplace accessory designed to bank a fire by completely covering the embers.
5. A regulation in feudal Europe by which fires had to be covered up or put out at a certain fixed time in the evening, marked by the ringing of an evening bell.