Definitions

1. adjective

most clear, transparent, or free from mist or cloudiness

“The clartiest day of the year was perfect for a hot air balloon ride.”

2. adverb

in the most clear, transparent, or free from mist or cloudiness manner

“The city looked its clartiest when the morning fog lifted.”

3. superlative

superlative form of clear

“The lake looked clartiest after the storm had passed.”