Definition of "couldn't" []

• Contraction of could not. (noun-possessive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Famous for dressing stars such as Rihanna, Blake Lively, Naomi Campbell and Penelope Cruz in their fairytale-esque creations, the British design duo behind the label couldn't resist the opportunity to make over the Playboy bunny in Marchesa."
• "The newspaper reported that Perry said his father painted over the word in the early 1980s, and that it was eventually turned over to further ensure the word couldn't be seen."
• "Anyone who thought that an Alabama win tonight might call into question who deserves the national title couldn't possibly have any doubt after seeing LSU drown in the Crimson Tide."