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

There's no word on its possible availability direct to consumers for installation on their own helmets. —New Atlas, 19 Apr. 2026

Motorsports sanctioning bodies and manufacturers continually work to improve safety measures, to better protect competitors, spectators, track personnel and others every time racers strap on their helmets, buckle their safety belts, take to the track and compete. —Jan Wagner, San Diego Union-Tribune, 18 Apr. 2026

Duprey was not wearing a helmet. —ABC News, 17 Apr. 2026

School officials said athletes will also wear tributes in their honor, including helmet stickers, black armbands, and bracelets supporting Jamison's recovery. —Christopher Harris, CBS News, 16 Apr. 2026

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