Definition of double letter
1 : ligature
2 : a letter written on two sheets and requiring double postage
Comments on double letter
What made you want to look up double letter? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Slippery Words Quiz—Changing with the Times
- What is an earlier meaning of nice?
Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
Spell words. Make bears.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Share double letter