A key, especially to an outside door. / A child who is given a key to the home and is expected to remain at home alone (without adult supervision until the parents return from work).

Equipped with a key; generally in the phrase latchkey child.

plural of latchkey

plural of latchkey kid

(informal) A schoolchild who carries keys to his or her house because there is usually no parent home when school finishes.

latchkey kid

plural of latchkey child