Helmet :: Helmet (n.) A defensive covering for the head. See Casque, Headpiece, Morion, Sallet, and Illust. of Beaver..
Helmet :: Helmet (n.) The representation of a helmet over shields or coats of arms, denoting gradations of rank by modifications of form..
Helmet :: Helmet (n.) A helmet-shaped hat, made of cork, felt, metal, or other suitable material, worn as part of the uniform of soldiers, firemen, etc., also worn in hot countries as a protection from the heat of the sun..
Helmet :: Helmet (n.) That which resembles a helmet in form, position, etc..