Definitions

1. adjective

relating to or denoting Mount Rainier, a volcano in the state of Washington, USA

“The mountain climber was on the expedition to Mount Rainier, the tallest peak in the state.”

2. comparative adjective

comparing two things, with the first being greater in intensity, amount, or degree

“The rainier parts of the city received the most rainfall during the storm.”

3. adverb

used to compare the amount or degree of something

“The concert was more rainier than the previous one.”