return mail noun
[noncount] US : mail that answers or responds to something
▪ We received a lot of return mail after the announcement. ▪ Fill out the enclosed form and send it back by return mail. [=(Brit) by return of post] [=immediately; as soon as possible]
▪ We received a lot of return mail after the announcement. ▪ Fill out the enclosed form and send it back by return mail. [=(Brit) by return of post] [=immediately; as soon as possible]
