Definition of hay fever
: an acute allergic reaction to pollen that is usually seasonal and is marked by sneezing, nasal discharge and congestion, and itching and watering of the eyes
— called also pollinosis
Buying Guide
Our Reviews team has selected the best vacuums for allergies.
Test Your Vocabulary
Great Words for Scrabble
-
- Which of the following Q-without-U words means the number five in cards or dice?

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 hay fever
Time Traveler for hay fever
The first known use of hay fever was in 1829
See more words from the same year