hard rubber

noun

: a firm rubber or rubber product
especially : a normally black horny substance made by vulcanizing natural rubber with high percentages of sulfur

Examples of hard rubber in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The top and bottom of the Play are made from a hard rubber commonly used in portable speakers. Eric Zeman, PC Magazine, 26 Mar. 2026 The 3mm lugs provide secure footing on mellow dirt and gravel surfaces, while still allowing the shoe to run smoothly on roads—there’s no slapping sound or feel of hard rubber hitting pavement, or clunkiness from toothy lugs meant for super-technical terrain. Lisa Jhung, Outside, 16 Mar. 2026 Its hard rubber on the outside is super durable and safe and has a firm handle for easy transportation. Bestreviews, Mercury News, 10 Nov. 2025 In late October, the M.T.A. did install barriers—vertical pads made of hard rubber—in between cars on some trains operating on the 7 line, restricting climbing routes. Doreen St. Félix, New Yorker, 8 Nov. 2025 See All Example Sentences for hard rubber

Word History

First Known Use

1855, in the meaning defined above

Time Traveler
The first known use of hard rubber was in 1855

Browse Nearby Words

Cite this Entry

“Hard rubber.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hard%20rubber. Accessed 3 Apr. 2026.

Kids Definition

hard rubber

noun
: a firm rubber or rubber product
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster