[həˈrʌɪzn], (Noun)

Definitions:
- the line at which the earth's surface and the sky appear to meet
(e.g: the sun rose above the horizon)

- the limit of a person's knowledge, experience, or interest
(e.g: she wanted to leave home and broaden her horizons)

- a layer of soil or rock, or a set of strata, with particular characteristics


Phrases:
- on the horizon

Origin:
late Middle English: via Old French from late Latin horizon, from Greek horizōn (kuklos) ‘limiting (circle)’