The visible horizontal line (in all directions) where the sky appears to meet the earth in the distance.

(aviation) An instrument that displays the pitch and roll of an aircraft in flight by comparing its attitude to a gyroscopically-maintained indication of the flat horizon line.

(humorous, euphemistic, of a person) Fat, obese.

(economics) The integrating of identical stages in the production or marketing process under the ownership or control of a single management organization.

plural of horizon

In a horizontal direction or position.

plural of event horizon

(genetics) The transfer of genetic material from one organism to another one that is not its offspring; especially common among bacteria.

(astronomy) The distance from an observer in a universe beyond which it is impossible for the observer to see, as the light (or other luminal particles) cannot have travelled that distance over the current age of that universe.

(geology) A form of graded bedding that occurs at the bottom of a body of water. The principle says that smaller colloids (particles) settle farther in the strata while larger particles settle closer to the source of water.