Definition of ash borer
: any of various insect larvae that bore in the wood of ash trees
especially
: a larval clearwing (Podosesia syringae fraxini) of eastern and central North America
Keep scrolling for more
Test Your Vocabulary
Who Knew?
-
- What is a ruelle?

Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
Spell words. Make bears.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Share ash borer