Clearness

Noun

1. Brightness, brilliancy. .mw-parser-output .defdate{font-size:smaller}
2. Mental or sensory distinctness; clarity of understanding, perception etc.
3. The state of being free from obscurities or opacity; distinctness of light, colour etc.

   "The clearness of the water meant I could still see the key lying on the river-bed."

4. The state of being free from obstruction or interference.

   "The clearness of the path made for an easy hike."