an order establishing a specific time in the evening after which certain regulations apply, especially that no civilians or other specified group of unauthorized persons may be outdoors or that places of public assembly must be closed.

a regulation requiring a person to be home at a certain prescribed time, as imposed by a parent on a child.

the time at which a daily curfew starts.

the period during which a curfew is in effect.

a signal, usually made with a bell, announcing the start of the time of restrictions under a curfew.