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

For best results, Weiser advises using a low level light therapy cap or helmet three to five times a week alongside a scalp serum with growth factors or scalp-supporting peptides. —Rebecca Strong, USA Today, 3 Apr. 2026

As part of the multiyear deal, the NFL and NFLPA will give Fanatics Collectibles the rights to use official team logos, names, marks, helmet designs and uniforms, as well as official NFL branding for cards and packaging. —Sportico Staff, Sportico.com, 3 Apr. 2026

Watches, rings and race car helmets When Final Four teams arrived in Indianapolis, they were gifted a race car helmet and watches, which led to Hurley’s speech about coming for rings, not watches, as soon as the team got off the plane. —Joe Arruda, Hartford Courant, 3 Apr. 2026

Police had also offered a reward of 100,000 euros for information leading to the helmet's recovery. —CBS News, 2 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