Used chiefly as an abbreviation for "apartment" in postal addresses and informal writing.
Definitionen
Abbreviation of apartment, used especially in addresses. Please send the package to Apt 4C.
Rare/archaic transitive verb meaning “to fit or adapt; make suitable.”
Definitionen
Archaic or dialect. To fit or adapt (something); to make suitable or appropriate. He apted his remarks to the needs of a younger audience.