Horizon

[huh-rahy-zuh n] /həˈraɪ zən/

noun
1.
the line or circle that forms the apparent boundary between earth and sky.
2.
Astronomy.

3.
the limit or range of perception, knowledge, or the like.
4.
Usually, horizons. the scope of a person’s interest, education, understanding, etc.:
His horizons were narrow.
5.
Geology. a thin, distinctive stratum useful for stratigraphic correlation.
6.
Also called soil horizon. any of the series of distinctive layers found in a vertical cross section of any well-developed soil.
/həˈraɪzən/
noun
1.
Also called visible horizon, apparent horizon. the apparent line that divides the earth and the sky
2.
(astronomy)

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 layer in a soil profile having particular characteristics See A horizon, B horizon, C horizon
6.
on the horizon, likely or about to happen or appear
n.

late 14c., orisoun, from Old French orizon (14c., Modern French horizon), earlier orizonte (13c.), from Latin horizontem (nominative horizon), from Greek horizon kyklos “bounding circle,” from horizein “bound, limit, divide, separate,” from horos “boundary.” The h- was restored 17c. in imitation of Latin.
horizon
(hə-rī’zən)

see: on the horizon