Definition of least bittern
: a small American bittern (Ixobrychus exilis) that is largely black above with chestnut or yellowish brown sides fading to white below
Test Your Vocabulary
Which Word Does Not Belong?
-
- Which of these words does not mean "nonsense"?

Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share least bittern