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Synonyms

keel over

British  

verb

  1. to turn upside down; capsize

  2. informal (intr) to collapse suddenly

"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

keel over Idioms  
  1. Collapse, as if in a faint; also, faint. For example, When she heard the awful news, she keeled over. This term alludes to a vessel rolling on its keel and capsizing. [Mid-1800s]


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It’s the humidity, which has spiked to over 80%, that has them feeling ready to keel over between sets.

From The Wall Street Journal • Oct. 10, 2025

“I feel fine; I’ll probably keel over after I hang up the phone,” he joked.

From Los Angeles Times • Jul. 10, 2025

“I thought maybe I would keel over on the bench because I love it, I love it, I love it.”

From Seattle Times • Apr. 10, 2024

Some did not land on the target surface with perfect finesse: they might swing under or keel over the platform, for example.

From Scientific American • Aug. 5, 2021

The twins were doing their best to steady her by hoisting her arms around their shoulders and bearing most of her weight, but she still looked like she was ready to keel over.

From "Summer of the Mariposas" by Guadalupe García McCall

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