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Synonyms

undies

American  
[uhn-deez] / ˈʌn diz /

plural noun

  1. women's or children's underwear.

undies British  
/ ˈʌndɪz /

plural noun

  1. informal women's underwear

"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 undies

First recorded in 1895–1900; und(erwear) + -ie + -s 3

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.

Customers receive a card explaining the provenance of their “health-enabling” undies, including the locations where the fiber is grown, milled into fabric, dyed and sewn.

From The Wall Street Journal • Jan. 16, 2026

I hoped, if nothing else, those fancy private hospitals hooked her up with a bunch of those postpartum mesh undies, which are truly every new mother’s birthright.

From Los Angeles Times • Feb. 29, 2024

The most surreal moment crafted belongs to a mutistory giant in undies wearing an ogre’s ship on its head and stomping a hut with a pair of creatures arguing while they meet their demise.

From Washington Times • Jul. 7, 2023

So to keep warm, Georgia says to make sure to "go heavy on the underwear… maybe thermal undies" in Wales.

From BBC • Nov. 20, 2021

The Toad—short and squat, as his nickname implied—bounded in and pushed his way past her, grabbing for the undies atop Darnell’s head.

From "The Kill Order (Maze Runner, Book Four; Origin)" by James Dashner

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.