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Longman Dictionary of Contemporary English
self-addressed
adjective
COLLOCATIONS FROM OTHER ENTRIES
a self-addressed envelope (=one with your own name and address on)
▪ Enclose a self-addressed envelope with your application form.
stamped, self-addressed envelope (=with your address on it so it can be sent back to you)
▪ Send a stamped, self-addressed envelope.
COLLOCATIONS FROM CORPUS
■ NOUN
envelope
▪ Letters requiring a personal reply must be accompanied by a stamped self-addressed envelope or a self addressed envelope and international reply coupons.
▪ Smyth requests a check and a self-addressed envelope with your request.
▪ Specify which countries' sheets you desire, and enclose a self-addressed envelope with sufficient postage attached.
▪ I enclose a stamped self-addressed envelope.
EXAMPLES FROM CORPUS
▪ I enclose a stamped self-addressed envelope.
▪ Letters requiring a personal reply must be accompanied by a stamped self-addressed envelope or a self addressed envelope and international reply coupons.
▪ Smyth requests a check and a self-addressed envelope with your request.
▪ Specify which countries' sheets you desire, and enclose a self-addressed envelope with sufficient postage attached.
The Collaborative International Dictionary
self-addressed

addressed \addressed\ adj. 1. marked with a destination; -- of mail [Narrower terms: self-addressed ] {unaddressed

Wiktionary
self-addressed

a. Addressed to oneself.

WordNet
self-addressed

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.