canker sore

noun

Definition of canker sore 

: 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

Examples of canker sore in a Sentence

Recent Examples on the Web

The products--sold under brand names like Orajel and Chloraseptic, as well as store brands and generics--are often used for relief from sore throats, canker sores and other oral irritations, according to the FDA. Laura Mcknight, NOLA.com, "Teething gels pose 'serious risk' to babies, FDA warns," 23 May 2018 Most canker sores resolve on their own within one to two weeks. Roni Caryn Rabin, New York Times, "What Causes Canker Sores?," 16 Mar. 2018 Now, for the burning question: Is alum a miracle treatment for canker sores? Zahra Barnes, SELF, "Why Trying to Cure Canker Sores With Alum May Not Be Worth It," 12 Dec. 2017 Then, like an unsightly canker sore on the lips of its résumé, lives the measly four takeaways which leave them tied for second-worst in the NFL. Paul Dehner Jr., Cincinnati.com, "Cincinnati Bengals notes: Turnovers a glaring gap," 26 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'canker sore.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of canker sore

circa 1596, in the meaning defined above

Keep scrolling for more

Learn More about canker sore

Share canker sore

Statistics for canker sore

Look-up Popularity

Time Traveler for canker sore

The first known use of canker sore was circa 1596

See more words from the same year

Keep scrolling for more

More Definitions for canker sore

canker sore

noun

English Language Learners Definition of canker sore

: a small painful sore inside the mouth

canker sore

noun
can·​ker sore | \ˈkaŋ-kər-\

Kids Definition of canker sore

: a small painful sore of the mouth

canker sore

noun

Medical Definition of canker sore 

: 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

More from Merriam-Webster on canker sore

See words that rhyme with canker sore

Britannica.com: Encyclopedia article about canker sore

Comments on canker sore

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

a trusted follower

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!