(obsolete) Brightness, brilliancy. / Mental or sensory distinctness; clarity of understanding, perception etc. / The state of being free from obscurities or opacity; distinctness of light, colour etc.

plural of clearness

(chiefly US, idiomatic) Not guilty or not suspected of wrongdoing. / (of a television, radio or data transmission) Transmitted without encryption or scrambling. / (idiomatic) No longer in danger.

Obsolete spelling of clear

The act or process of making or becoming clear. / An area of land within a wood or forest devoid of trees. / An open space in the fog etc.

present participle of clear

simple past tense and past participle of clear

(Scientology) An idea state of beingness free of unwanted influences.

All the way; entirely. / Not near something or touching it. / Free (or separate) from others. / In a clear manner; plainly.

Transparent in colour. / Bright; luminous; not dark or obscured. / Free of obstacles. / Without clouds. / (meteorology) Of the sky, such that less than one eighth of its area is obscured by clouds.