Definitionen
1.NounA key, especially to an outside door.
2.Noun(Can we verify this sense?) Ellipsis of latchkey kid.
3.NounEllipsis of latchkey program.
4.Adjective(Should we delete this sense?) Equipped with a key; generally in the phrase latchkey kid.
5.AdjectivePertaining to unsupervised children in afterschool care contexts.
6.VerbTo open something by means of a latchkey.