Definition of viral
1
: of, relating to, or caused by a virus
a viral infection
2
: quickly and widely spread or popularized especially by means of social media
a viral video
Test Your Vocabulary
Name That Food
-
- Name these cookies!

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 viral
Time Traveler for viral
The first known use of viral was in 1937
See more words from the same year