1. A circle bounding the view where the earth and sky seem to meet, called the sensible horizon, as distinguished from the great circle parallel to it, the centre of which is the centre of the earth, called the rational horizon.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• horizonal,
• horizont,
• prizon,
• horizen,
• horiozon,
• horzion,
• horozion,
• harrizon,
• horizan,
• horizent,
• horizans,
• corazon,
• arizon,
• horizens,
• horizone,
• horizions,
• harion,
• horisin,
• corizone,
• horizn

• horrigan,
• hourigan,
• horizontal.

The adverb form of "horizon" is "horizontally".

The adjective form of the word "horizon" is "horizonal".

The plural of the "horizon" can be the "horizons".

The singular of the "horizon" can be the "horizon".