n. The act of opening to view, laying bare, or revealing: as, the exposure of a vein of ore, or of a crime.n. The state of being open or subject to some action or influence; a being placed in the way of something, as observation, attack, etc.: as, exposure to cold or to the air; exposure to danger or to contagion.n. The thing revealed or exposed.n. In photography, the act of presenting to the action of the actinic rays of light: as, the exposure was too long.n. Situation with regard to the access of light or air; position relative to the sun or to the points of the compass; aspect: as, a southern exposure.n. The act of casting out, or abandoning to chance, in some unsheltered or unprotected place; abandonment to death from cold, starvation, etc.: as, the exposure of a child.n. In meteorology, the method of placing any instrument so that it shall correctly measure a given meteorological element.n. In forestry, see aspect, 9.