Longman Dictionary of Contemporary English
The Collaborative International Dictionary
addressed \addressed\ adj. 1. marked with a destination; -- of mail [Narrower terms: self-addressed ] {unaddressed
Wiktionary
a. Addressed to oneself.
WordNet
adj. addressed to yourself; "enclose a stamped self-addressed envelope with all submissions"
Usage examples of "self-addressed".
All three required a return self-addressed envelope with International Reply Coupons.
He'd sent it airmail, and stuck another red six-cent stamp on the self-addressed return envelope he enclosed with it.
Of course you must include return postage and a self-addressed envelope for mailing, in the unhappy event that your story is rejected.
They're going to type a letter to a store owner in southern Zealand who is, indirectly, one of Opekta' s customers and ask him to fill out a form and send it back in the enclosed self-addressed envelope.