con·​cav·​i·​ty | \ kän-ˈka-və-tē How to pronounce concavity (audio) \
plural concavities

Definition of concavity

1 : a concave line, surface, or space : hollow
2 : the quality or state of being concave

Keep scrolling for more

Examples of concavity in a Sentence

the concavity of the lens The lower back forms a concavity. The large concavities along the wall of the restaurant are like private rooms.
See More

Recent Examples on the Web

To serve labneh fresh, envision its cousins, hummus and baba ganoush, and schmear it on a platter into a round of attractive concavity, like an inverted Frisbee. James P. Dewan,, "How to make labneh, the luscious Middle Eastern yogurty spread," 21 Aug. 2019 As the migraine attack ended, the swelling would recede and return to a concavity. Katherine Foxhall, Time, "How A Nurse With a Hole in Her Skull Changed The Medical History of Migraines," 18 June 2019 Volume loss under the eye and concavity is the usual cause of dark circles. Crystal Martin, New York Times, "How to Go Makeup-Free This Summer," 1 Aug. 2017 It’s backlit (though leaky), and the island-style keys have a gentle concavity to them, making touch typing fairly easy. Christopher Null, WIRED, "Review: Dell XPS 12," 23 Oct. 2012

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'concavity.' 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 concavity

15th century, in the meaning defined at sense 1

Keep scrolling for more

Learn More about concavity

Statistics for concavity

Last Updated

31 Aug 2019

Look-up Popularity

Time Traveler for concavity

The first known use of concavity was in the 15th century

See more words from the same century

Keep scrolling for more

More Definitions for concavity



English Language Learners Definition of concavity

: the quality or state of being concave : the quality of being curved inward
: a shape that is curved inward : a concave shape


con·​cav·​i·​ty | \ kän-ˈkav-ət-ē How to pronounce concavity (audio) \
plural concavities

Medical Definition of concavity

1 : a concave surface or space
2 : the quality or state of being concave

More from Merriam-Webster on concavity

Thesaurus: All synonyms and antonyms for concavity

Comments on concavity

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


to spread over or through

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Syn City

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

Love words? Need even more definitions?

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