couldn't

[koo d-nt]

Usage note

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for couldn't

couldn't

contraction of
  1. could 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

Word Origin and History for couldn't

by 1670s, contraction of could + not.

Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with couldn't

couldn't

In addition to the idioms beginning with couldn't

  • couldn't care less

also see:

  • hurt a flea, couldn't

Also see undercan't.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.