Definitions

1. noun

A small lake or pool of water, especially one formed in a glacial depression or surrounded by mountains.

“The hikers followed the stream to a picturesque tarn nestled in the mountains.”

2. verb

To spoil or damage the appearance or quality of something, especially a surface.

“The careless driver’s tire tracks tarnished the pristine snow on the mountain slope.”

3. verb

To become or make something less valuable or less attractive.

“The news tarnished the reputation of the once-respected politician.”