romaine

American

[roh-meyn, ruh-] / roʊˈmeɪn, rə- /

noun

Also called cos, cos lettuce. Also called romaine lettuce,. a variety of lettuce, Lactuca sativa longifolia, having a cylindrical head of long, relatively loose leaves.

romaine British

/ rəʊˈmeɪn /

noun

the usual US and Canadian name for cos 1

"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 romaine

1905–10; < French, feminine of romain Roman

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.

Marler Clark also amended five other cases to include Taylor Farms’ romaine lettuce, which sickened over 50 individuals after it was found in salads catered at a high school in St. Louis, Missouri.

From Salon • Apr. 24, 2025

On Friday, Meghan posted a video to Instagram which showed her wearing a hat with the writing "lettuce romaine calm" stitched across the front of it.

From BBC • Mar. 7, 2025

That includes raw almonds, down a dollar to $3.99 per pound; romaine hearts were cut 50 cents to $2.99; and organic tri-color bell peppers were reduced 50 cents to $4.49.

From Los Angeles Times • Mar. 25, 2024

The deployment of lettuces other than romaine — e.g., kale, chicories, radicchio — should always be accompanied by a menu-warning, so that those opposed may opt out.

From Seattle Times • Mar. 7, 2024

Also, I felt confused, because I didn’t know anyone whose favorite food was romaine lettuce.

From "Darius the Great Is Not Okay" by Adib Khorram

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