razor blade

British

noun

a small rectangular piece of metal sharpened on one or both long edges for use in a razor for shaving

"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

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razor blade

"I borrowed a razor blade to cut the placenta," she told AFP.

From Barron's ● Aug. 12, 2026

For any painting he decided was wanting, Soutine kept a razor blade in his studio to shred it.

From The Wall Street Journal ● Dec. 5, 2025

According to some reports, there may be tell-tale symptoms with the latest ones - a hoarse voice or a "razor blade" sore throat.

From BBC ● Sep. 30, 2025

“But talking about vaccines on the Hill is like walking on a razor blade that’s on fire.”

From Salon ● Jul. 17, 2025

Hitting a forty-mile target from a distance of 238,000 miles is about like trying to split a human hair with a razor blade thrown from a distance of twenty feet.

From "Flying to the Moon: An Astronaut's Story" by Michael Collins

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023