helmet

noun

hel·​met ˈhel-mət 

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

ˈhel-mə-təd 

adjective

helmetlike

ˈhel-mət-ˌlīk 

adjective

Examples of helmet in a Sentence

Recent Examples on the Web

When the broadcast returned the next half inning, Plouffe was wearing an oversized helmet, which led to more laughter. —Dan Hayes, New York Times, 11 July 2025

Regardless, there's no denying this is one seriously cool helmet; one which packs in a lot more detail than your average Star Wars helmet. —Kim Snaith, Space.com, 10 July 2025

In the photos, he is seen smiling and posing with a bear in the background while wearing a motorcycle helmet. —Madison E. Goldberg, People.com, 10 July 2025

When Morris was detained, an officer discovered multiple firearms, including two AR-15-style rifles, ballistic vests and a helmet in his car, the complaint states. —Chloe Atkins, NBC news, 8 July 2025

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

Phrases Containing helmet

• crash helmet
• pith helmet

Kids Definition

helmet

noun

hel·​met ˈhel-mət 

1

: a covering or enclosing headpiece of armor

2

: any of various protective head coverings usually made of a hard material

helmetlike

-ˌlīk 

adjective