1. frost formed on cold objects by the rapid freezing of water vapor in cloud or fog.
▪ hoarfrost:"the rime was thick and crisp on the grass"
verb
1. cover (an object) with hoarfrost:literary"he does not brush away the frost that rimes his beard"
Word OriginOld Englishhrīm, of Germanic origin; related to Dutch rijm. The word became rare in Middle English but was revived in literary use at the end of the 18th century.