Definitions

1. verb

to remove the frost or ice from something, especially a surface or a road

“The workers had to unfrost the roads before they could be driven on.”

2. verb

to become free from frost or ice

“The ground will unfrost soon as the sun rises higher in the sky.”

3. noun

the act of removing frost or ice from something

“The unfrosting of the roads was a long and laborious process.”