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

Medical Dictionary

contagious

play
adjective con·ta·gious \-jəs\

Medical Definition of contagious

  1. 1:  communicable by contact <tuberculosis in the contagious stage>—compare infectious 2

  2. 2:  bearing contagion <many persons…are contagious long before they are aware of the presence of their disease—Journal of the American Medical Association>

  3. 3:  used for contagious diseases <a contagious ward>

  4. con·ta·gious·ly adverb
    con·ta·gious·ness noun





Seen and Heard

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

WORD OF THE DAY

February 12, 2016

of, relating to, or suggestive of marble

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

16.96 pounds 2.2 pounds 100 pounds 196.5 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ