horizon (həˈraɪzən) ![]() | |
| —n | |
| 1. | visible horizon, Also called: apparent horizon the apparent line that divides the earth and the sky |
| 2. | astronomy |
| a. Also called: sensible horizon the circular intersection with the celestial sphere of the plane tangential to the earth at the position of the observer | |
| b. Also called: celestial horizon the great circle on the celestial sphere, the plane of which passes through the centre of the earth and is parallel to the sensible horizon | |
| 3. | the range or limit of scope, interest, knowledge, etc |
| 4. | a thin layer of rock within a stratum that has a distinct composition, esp of fossils, by which the stratum may be dated |
| 5. | A horizon B horizon See C horizon a layer in a soil profile having particular characteristics |
| 6. | on the horizon likely or about to happen or appear |
| [C14: from Latin, from Greek horizōn kuklos limiting circle, from horizein to limit, from horos limit] | |
| ho'rizonless | |
| —adj | |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a stew of meat, vegetables, potatoes, etc. |