hoarfrost

[ hawr-frawst, -frost, hohr- ]
/ ˈhɔrˌfrɔst, -ˌfrɒst, ˈhoʊr- /

noun

Origin of hoarfrost

First recorded in 1250–1300, hoarfrost is from the Middle English word hor-frost. See hoar, frost
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for hoarfrost

hoarfrost

/ (ˈhɔːˌfrɒst) /

noun

a deposit of needle-like ice crystals formed on the ground by direct condensation at temperatures below freezing pointAlso called: white frost

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for hoarfrost

hoarfrost

[ hôrfrôst′ ]

Frozen dew that forms a white coating on a surface.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.