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lightening

American  
[lahyt-n-ing] / ˈlaɪt n ɪŋ /

noun

Medicine/Medical.
  1. the descent of the uterus into the pelvic cavity, occurring toward the end of pregnancy, changing the contour of the abdomen and facilitating breathing by lessening pressure under the diaphragm.


lightening British  
/ ˈlaɪtənɪŋ /

noun

  1. obstetrics the sensation, experienced by many women late in pregnancy when the head of the fetus enters the pelvis, of a reduction in pressure on the diaphragm, making it easier to breathe

"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

Etymology

Origin of lightening

First recorded in 1520–30; lighten 2 + -ing 1

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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.

The F-150 Lightening will instead be redesigned as a hybrid vehicle, with a gas-powered generator.

From BBC • Dec. 15, 2025

Scorsese rightly noted that "Came the Lightening" isn't your usual collection of poetry.

From Salon • Dec. 7, 2022

Afterward, Talbot will rejoin Adelaide Lightening as for the ninth season and will serve as club captain.

From Seattle Times • Sep. 9, 2022

Lightening is a type of natural disturbance whereas pollution is a human related disturbance.

From Textbooks • Jun. 9, 2022

When she insisted on the Negative, I pray'd there might be no more Thunder and Lightening, I should not sleep all night.

From The Best of the World's Classics, Restricted to Prose, Vol. IX (of X) - America - I by Lodge, Henry Cabot

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