horizon

noun Etymology: Middle English orizon, from Late Latin horizont-, horizon, from Greek horizont-, horizōn, from present participle of horizein to bound, define, from horos boundary; perhaps akin to Latin urvum curved part of a plow Date: 14th century 1. a. the apparent junction of earth and sky b. the great circle on the celestial sphere formed by the intersection of the celestial sphere with a plane tangent to the earth's surface at an observer's position — see azimuth illustration c. range of perception or experience d. something that might be attained <

new horizons

> 2. a. the geological deposit of a particular time usually identified by distinctive fossils b. any of the reasonably distinct layers of soil or its underlying material in a vertical section of land c. a cultural area or level of development indicated by separated groups of artifacts • horizonal adjective