- latchkey [lach′kē΄]n.a key for drawing back or unfastening the latch of a door, esp. of an outer door, from the outsideadj.[from the door key carried by such a child]designating, of, or having to do with a child or children who receive no supervision at home after school hours, because their parents are away working
English World dictionary. V. Neufeldt. 2014.