Definition of "mightn't" []

• Contraction of might 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.

• "If he tapped the cage, mightn't that speed Rocky's reaction, allowing him to bring the story in on time for his readers to read it?"
• "Unfortunately, a yield that floats after interest rates rise a lot—but mightn't while they rise just a bit—probably isn't what many investors had in mind when they bought these funds."
• "But mightn't she be talking about Carol Moseley Braun, the woman who Rev."