(transitive) To make bright or brighter in color. / (transitive) To make illustrious, or more distinguished; to add luster or splendor to

plural of brightener

One who or that which brightens. / A chemical agent that absorbs ultraviolet and violet light and re-emits blue light by fluorescence, used to make fabric or paper look whiter.

simple past tense and past participle of brighten

Third-person singular simple present indicative form of brighten

An instance of becoming brighter.

present participle of brighten

plural of brightening

That can be brightened.

(intransitive, said of the weather) To become brighter / (transitive) To make cheerful.