Definitions

1. comparative adjective

comparing two things, indicating that one is colder or frostier than the other

“The icier road conditions made the drive more hazardous.”

2. superlative adjective

comparing three or more things, indicating that one is the coldest or frostiest

“The mountain was the icier of all the ones we climbed that day.”

3. noun

a person or thing that is colder or frostier

“The skier had to navigate the treacherous icier on the mountain.”