[ uh-sid-i-tee ]
/ əˈsɪd ɪ ti /


the quality or state of being acid.
sourness; tartness.
excessive acid quality, as of the gastric juice.

Origin of acidity

From the Late Latin word aciditās, dating back to 1610–20. See acid, -ity

Related forms

non·a·cid·i·ty, nouno·ver·a·cid·i·ty, nounpre·a·cid·i·ty, nounsu·per·a·cid·i·ty, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for acidity

British Dictionary definitions for acidity


/ (əˈsɪdɪtɪ) /

noun plural -ties

the quality or state of being acid
the amount of acid present in a solution, often expressed in terms of pH
another name for hyperacidity

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

Medicine definitions for acidity


[ ə-sĭdĭ-tē ]


The state, quality, or degree of being acid.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.