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isn't

[iz-uh nt]

contraction of is not.

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Read more in this article about some frequently asked questions and fun facts related to our definitions.

Read more in this article about some frequently asked questions and fun facts related to our definitions.

Usage note

See contraction.

Pronunciation note

Isn't is often pronounced

[id-nt] /ˈɪd nt/ in the South Midland and Southern U.S., with

[d] /d/, a stop consonant, substituting for

[z] /z/, a sibilant. This substitution results from an assimilatory process in which the tip of the tongue, in anticipation of the articulatory position for the following

[n] /n/, touches the upper alveolar ridge. This same process gives

[wuhd-nt] /ˈwʌd nt/ for wasn't and

[bid-nis] /ˈbɪd nɪs/ for business. These pronunciations are heard from speakers on all social levels.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for isn't

isn't

contraction of

is not

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