Meaning of HORIZON in English

HORIZON

■ noun

1》 the line at which the earth's surface and the sky appear to meet.

↘(also apparent ~ ) this line represented as a circle, ignoring irregularities and obstructions.

↘(also true ~ ) Astronomy a great circle of the celestial sphere, the plane of which passes through the centre of the earth and is parallel to that of the apparent ~.

2》 the limit of a person's knowledge, experience, or interest.

3》 Geology & Archaeology a layer or level of soil or rock with particular characteristics or representing a particular period.

Phrases

on the ~ imminent.

Origin

ME: via OFr. from late L. ~ , from Gk horizōn (kuklos) 'limiting (circle)'.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.