/ ˈhɔː frɒst; NAmE ˈhɔːr frɔːst/ noun
[ U ] a layer of small pieces of ice that look like white needles and that form on surfaces outside when temperatures are very low
/ ˈhɔː frɒst; NAmE ˈhɔːr frɔːst/ noun
[ U ] a layer of small pieces of ice that look like white needles and that form on surfaces outside when temperatures are very low
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005