Definition of flare-up
1
: a sudden outburst or intensification
a flare-up of hostilities
2
: a sudden bursting (as of a smoldering fire) into flame or light
a danger of flare-ups
3
: a sudden appearance or worsening of the symptoms of a disease or condition
an asthmatic flare-up
Test Your Vocabulary
Eponyms: Words Named After People
-
- What is the best definition of boycott?

Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share flare-up
Time Traveler for flare-up
The first known use of flare-up was in 1839
See more words from the same year