hel‧met /ˈhelmət, ˈhelmɪt/
noun [countable][
Date: 1400-1500;
Language: Old French;
Origin: helme 'helmet']
a strong hard hat that soldiers,
motorcycle riders, the police etc wear to protect their heads ⇒
crash helmet,
pith helmet [TahlilGaran] Dictionary of Contemporary English ▲