To save this word, you'll need to log in.
Definition of bad breath
: breath that smells unpleasant
He has bad breath.
Learn More about bad breath
From the Editors at Merriam-Webster
7 Fancy Words for Crude Bodily Functions
7 Fancy Words for Crude Bodily Functions
A gross thing by any other name...
Dictionary Entries near bad breath
See More Nearby EntriesStatistics for bad breath
Look-up Popularity
Comments on bad breath
What made you want to look up bad breath? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Pass the Little Ribbons: A Pasta Word Quiz
- Match the pasta to its meaning in English: Rotelle
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
- Pass the Little Ribbons: A Pasta Word Quiz
Match the pasta with its meaning in Italian.
Take the quiz - Confusing Words—A Quiz
Test your knowledge of these commonly confused words!
Take the quiz - Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz - Syn City
Build a city of skyscrapers—one synonym at a time.
Play the game
Share bad breath
Resources for bad breath