GNU Collaborative International Dictionary of English

Found one definition

1.       
   Curfew , n. [OE. courfew, curfu, fr. OF. cuevrefu, covrefeu, F. couvre-feu; covrir to cover + feu fire, fr. L. focus fireplace, hearth. See Cover, and Focus.]
   The ringing of an evening bell, originally a signal to the inhabitants to cover fires, extinguish lights, and retire to rest, -- instituted by William the Conqueror; also, the bell itself.
   1913 Webster
   He begins at curfew, and walks till the first cock.
   Shak.
   
   1913 Webster
   The village curfew, as it tolled profound.
   Campbell.
   
   1913 Webster
   A utensil for covering the fire. [Obs.]
   1913 Webster
   For pans, pots, curfews, counters and the like.
   Bacon.
   
   1913 Webster