- 1[transitive, intransitive] to cover something or to become covered with a thin white layer of ice frost something (over/up) The mirror was frosted up. frost (over/up) The windows had frosted over.
- 2[transitive] frost something (especially North American English) to cover a cake with icing / frosting Word Origin Old English frost, forst, of Germanic origin; related to Dutch vorst and German Frost, also to freeze.
BrE BrE//frɒst//; NAmE NAmE//frɔːst//Verb Forms present simple I / you / we / they frost
BrE BrE//frɒst//; NAmE NAmE//frɔːst//he / she / it frosts
BrE BrE//frɒsts//; NAmE NAmE//frɔːsts//past simple frosted
BrE BrE//ˈfrɒstɪd//; NAmE NAmE//ˈfrɔːstɪd//past participle frosted
BrE BrE//ˈfrɒstɪd//; NAmE NAmE//ˈfrɔːstɪd//-ing form frosting
BrE BrE//ˈfrɒstɪŋ//; NAmE NAmE//ˈfrɔːstɪŋ//