a piece of protective or defensive armour for the head worn by soldiers, police officers, firefighters, divers, etc a part or structure resembling a helmet, esp the upper part of the calyx of certain flowers
WordReference Random House Learner's Dictionary of American English © 2025
hel•met /ˈhɛlmɪt/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2025- a usually strong and hard covering worn on the head for protection.
hel•met
(hel′mit),USA pronunciation n.
hel′met•ed, adj.
hel′met•like′, adj.
- any of various forms of protective head covering worn by soldiers, firefighters, divers, cyclists, etc.
- Heraldrymedieval armor for the head.
- Sport(in fencing, singlestick, etc.) a protective device for the head and face consisting of reinforced wire mesh.
- anything resembling a helmet in form or position.
- Middle French healmet, helmet, diminutive of helme helm2
- late Middle English 1400–50
hel′met•like′, adj.
Collins Concise English Dictionary © HarperCollins Publishers::
'helmet' also found in these entries (note: many are not synonyms or translations):
Anselm
- Balaclava
- Britannia
- armet
- barbut
- basinet
- bearskin
- beaver
- bite
- buckle
- burgonet
- busby
- cask
- casque
- chapel de fer
- close helmet
- coif
- comb
- corydalis
- crash helmet
- crest
- dishelm
- diving suit
- drudge
- face mask
- faceplate
- fire hat
- galea
- galeate
- galeiform
- hard hat
- hart
- hat
- headgear
- headguard
- headpiece
- helm
- helmet liner
- helmet shell
- hood
- impatiens
- lambrequin
- lobster-tail helmet
- mantling
- mesail
- morion
- nasal
- nosepiece
- orle
- panache