noun, plural cav·i·ties.

any hollow place; hollow.
Anatomy. a hollow space within the body, an organ, a bone, etc.
a hollow space or a pit in a tooth, most commonly produced by caries. A cavity may be artificially made to support dental restorations.

Origin of cavity

1535–45; < Middle French cavite < Late Latin cavitās hollowness, equivalent to Latin cav(us) hollow + -itās -ity
Related formscav·i·tied, adjectivesub·cav·i·ty, noun, plural sub·cav·i·ties.un·cav·i·tied, adjective

Synonyms for cavity

1. See hole. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for cavity

Contemporary Examples of cavity

Historical Examples of cavity

British Dictionary definitions for cavity


noun plural -ties

a hollow space; hole
dentistry a soft decayed area on a toothSee caries
any empty or hollow space within the bodythe oral cavity
electronics See cavity resonator

Word Origin for cavity

C16: from French cavité, from Late Latin cavitās, from Latin cavus hollow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for cavity

1540s, from Middle French cavité (13c.), from Late Latin cavitatem (nominative cavitas) "hollowness," from Latin cavus "hollow" (see cave (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper

cavity in Medicine




A hollow area within the body, such as a sinus cavity.
A pitted area in a tooth caused by caries.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

cavity in Science



A hollow; a hole.
A hollow area within the body.
A pitted area in a tooth caused by caries.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.