# Dahlke envelope

> English word · Noun · IPA /ˈdɑːlkə ˈɒnvəloʊp/

## Definitions
1. An airmail envelope with a distinct pattern of spaced diamonds in alternating red and blue colours around the outer edge.

## Etymology
After its designer Benjamin Dahlke. In use in the late 1920s, the name was patented in 1929.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/dahlke-envelope