Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

viral

play
adjective vi·ral \ˈvī-rəl\

Simple Definition of viral

  • : caused by a virus

Source: Merriam-Webster's Learner's Dictionary

Full Definition of viral

  1. 1 :  of, relating to, or caused by a virus <a viral infection>

  2. 2 :  quickly and widely spread or popularized especially by person-to-person electronic communication <a viral video>

virally play \-rə-lē\ adverb

1937

First Known Use of viral

1937

Rhymes with viral


Medical Dictionary

viral

play
adjective vi·ral \ˈvī-rəl\

Medical Definition of viral

  1. :  of, relating to, or caused by a virus <viral infections>

virally \-rə-lē\play adverb



Learn More about viral


Seen and Heard

What made you want to look up viral? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

immature or lacking adult sophistication

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

prompt angry oily maudlin
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ