latchkey /ˈlæt͡ʃˌki/adjective 1noun 3verb 1forms 4 adjective1 •Pertaining to unsupervised children in afterschool care contexts.In fashionable Potomac, for instance, almost 50 percent of the nonparental care was latchkey. — 1985 noun3 •A key, especially to an outside door. •Ellipsis of latchkey kid. •Ellipsis of latchkey program.Latchkey is before and after school childcare for children who are in grades K-5. — 2025 verb1 •To open something by means of a latchkey. formslatchkeyed · latchkeying · latchkeys · Latchkeys