Illumination
Part of speech: noun
Definition: The act of illuminating, or supplying with light; the state of being illuminated. Festive decoration of houses or buildings with lights. Adornment of books and manuscripts with colored illustrations. See illuminate (transitive verb).
Example sentence: We forget just how painfully dim the world was before electricity. A candle, a good candle, provides barely a hundredth of the illumination of a single 100 watt light bulb.
Clarification
Part of speech: noun
Definition: The act of clarifying; the act or process of making clear or transparent by freeing visible impurities; particularly, the clearing or fining of liquid substances from feculent matter by the separation of the insoluble particles which prevent the liquid from being transparent.The act of freeing from obscurities.
Example sentence: No other question has ever moved so profoundly the spirit of man; no other idea has so fruitfully stimulated his intellect; yet no other concept stands in greater need of clarification than that of the infinite.