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hairpin

American  
[hair-pin] / ˈhɛərˌpɪn /

noun

  1. a slender U -shaped piece of wire, shell, etc., used by women to fasten up the hair or hold a headdress.

adjective

  1. (of a road, curve in a road, etc.) sharply curved back, as in a U shape.

    a hairpin turn.
hairpin British  
/ ˈhɛəˌpɪn /

noun

  1. a thin double-pronged pin used by women to fasten the hair

  2. (modifier) (esp of a bend in a road) curving very sharply

"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 hairpin

First recorded in 1770–80; hair + pin

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.