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

canker sore

noun

Simple Definition of canker sore

  • : a small painful sore inside the mouth

Full Definition of canker sore

  1. :  a painful shallow ulcer of the mouth that has a grayish-white base surrounded by a reddish inflamed area and is of uncertain cause but is not due to the virus causing herpes simplex — compare cold sore


CANKER SORE Defined for Kids

canker sore

noun can·ker sore \ˈkaŋ-kər-\

Definition of canker sore

  1. :  a small painful sore of the mouth




Medical Dictionary

canker sore

noun

Medical Definition of canker sore

  1. :  a small painful ulcer especially of the mouth; especially :  a painful shallow ulceration of the oral mucous membranes that has a grayish-white base surrounded by a reddish inflamed area and is characteristic of aphthous stomatitis—compare cold sore




Learn More about canker sore


Seen and Heard

What made you want to look up canker sore? 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 196.5 pounds 100 pounds 2.2 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