- a protective covering for the head; specif.,
- the headpiece of ancient or medieval armor
- the metal head covering worn in modern warfare
- the rigid head covering with inner padding and often a wire face mask used in football, lacrosse, and hockey
- the mesh-faced mask used in fencing
- the headpiece of a diver's suit, equipped with air tubes, glass windows, etc.
- a fireman's protective hat
- a pith hat with a wide brim, worn as a sunshade in hot countries
- the rigid head covering worn by a motorcyclist
- hard hat
- something suggesting such a headpiece in appearance or function, as a galea of a flower
Origin of helmetOld French diminutive of helme, helmet ; from Frankish an unverified form helm: for Indo-European base see helm
to cover or equip with a helmet
- a. A protective head covering made of hard material, such as leather, metal, or plastic: A firefighter's uniform includes a helmet.b. The headgear with a glass mask worn by deep-sea divers.c. A pith helmet; a topi.d. A head covering, such as a balaclava, that is shaped like a helmet.
- A piece of armor, usually made of metal, designed to protect the head.
- Botany The hood-shaped sepal or corolla of some flowers.
tr. & intr.v.hel·met·ed, hel·met·ing, hel·mets
To provide with or put on a helmet.
Origin of helmetMiddle English, from Old French, diminutive of helme, of Germanic origin; see kel-1 in Indo-European roots.