We found one dictionary that defines the word special request envelope:

Art (1 matching dictionary)

1. Glossary of Stamp Collecting Terms (No longer online)

▸ Words similar to special request envelope ▸ Usage examples for special request envelope ▸ Idioms related to special request envelope ▸ Wikipedia articles (New!) ▸ Words that often appear near special request envelope ▸ Rhymes of special request envelope ▸ Invented words related to special request envelope