hoar‧frost /ˈhɔːfrɒst $ ˈhɔːrfrɒːst/
noun [uncountable] formal[
Date: 1200-1300;
Origin: hoar 'gray, white' (11-20 centuries) (from Old English har) + frost]
a thin layer of ice that forms on objects outside when it is very cold
Synonym : frost:
A light hoarfrost covered the fields. [TahlilGaran] Dictionary of Contemporary English ▲