by return

by return (of post)

Through prompt mail correspondence back to the sender. Primarily heard in UK. Please indicate your interest in this offer by return of post. They need your RSVP card by return of post right away—it's due back tomorrow! Somebody remind Paulina that she needs to submit that permission slip by return ASAP.

See also: by, return

Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.

by reˈturn (of ˈpost)

(British English) using the next available post; as soon as possible: Please reply by return of post.

See also: by, return

Farlex Partner Idioms Dictionary © Farlex 2017