We found 2 dictionaries that define the word by return mail:

General (2 matching dictionaries)

1. by return mail: Merriam-Webster
2. by return mail: Cambridge Advanced Learner's Dictionary

▸ Words similar to by return mail ▸ Usage examples for by return mail ▸ Idioms related to by return mail ▸ Wikipedia articles (New!) ▸ Words that often appear near by return mail ▸ Rhymes of by return mail ▸ Invented words related to by return mail