noun Date: 1926 1. a protective hat made of rigid material (as metal or fiberglass) and worn especially by construction workers, a construction worker, a conservative who is intolerant of opposing views
HARD HAT
Meaning of HARD HAT in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012