Refers to the address written on a letter, package, or email; also used for the destination of a shipment.
封筒に宛先を書いてください。
Please write the address on the envelope.
この荷物の宛先はどこですか。
What is the destination of this package?
Please write the address on the front of the envelope.
I accidentally sent this email to the wrong address.
Please double-check the address before sending.
The mail came back marked 'address unknown'.
I added a new address to my address book.