Synonyms

slacks

American

[slaks] / slæks /

noun

(used with a plural verb)

men's or women's trousers for informal wear.

slacks British

/ slæks /

plural noun

informal trousers worn by both sexes

"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 slacks

First recorded in 1815–25; slack ¹ + -s ³

Compare meaning

How does slacks compare to similar and commonly confused words? Explore the most common comparisons:

trousers vs. slacks

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 Robles’ 76-year-old grandson Louis Jr. is keeping track of today’s Christmas tree delivery from a folding chair, wearing horn-rim glasses, slacks and a white, open-neck dress shirt.

From Los Angeles Times • Dec. 18, 2025

Still, James insisted that headquarters employees dress a cut above business casual, requiring jackets and slacks for men.

From The Wall Street Journal • Oct. 11, 2025

They were medium-handsome, in their 70s, and dressed dapperly in khaki slacks and navy sport coats bearing name tags that identified them as Bill and Frank.

From Salon • Jul. 4, 2025

Two men were outside Jackson’s door, Jackson said, dressed in slacks and polos.

From Slate • Apr. 23, 2025

She put one hand on the hip of her polyester slacks and took a few steps forward.

From "Hope Springs" by Jaime Berry

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