helmet

noun

hel·​met ˈhel-mət How to pronounce helmet (audio)
1
: a covering or enclosing headpiece of ancient or medieval armor see armor illustration
2
: any of various protective head coverings usually made of a hard material to resist impact
3
: something resembling a helmet
helmeted adjective
helmetlike adjective

Examples of helmet 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.
Cardo has also placed a helmet health indicator that monitors shell integrity and notifies you when the helmet may no longer be fit to be worn. New Atlas, 30 Oct. 2025 She's seen sporting boyfriend and tight end Mark Andrew's #89 jersey and oversized helmet. Tabitha Parent, PEOPLE, 30 Oct. 2025 Her return to her husband and daughter from a stint on the international space station was marred when space debris crashed into Sam’s capsule before landing, breaking her helmet. Stephen Schaefer, Boston Herald, 29 Oct. 2025 More than 100 investigators have been involved in the manhunt, and authorities were able to track down the individuals after analyzing more than 150 DNA samples and examining several items the group left behind, such as gloves, a helmet and high-vis jackets left at the scene. Saskya Vandoorne, CNN Money, 29 Oct. 2025 See All Example Sentences for helmet

Word History

Etymology

Middle English, from Middle French, diminutive of helme helmet, of Germanic origin; akin to Old English helm helmet, Old High German helan to conceal — more at hell

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of helmet was in the 15th century

Browse Nearby Words

Cite this Entry

“Helmet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/helmet. Accessed 1 Nov. 2025.

Kids Definition

helmet

noun
hel·​met ˈhel-mət How to pronounce helmet (audio)
1
: a covering or enclosing headpiece of armor
2
: any of various protective head coverings usually made of a hard material
helmetlike adjective

More from Merriam-Webster on helmet

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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