| Noun | 1. | horizontal - something that is oriented horizontally |
| Adj. | 1. | horizontal - parallel to or in the plane of the horizon or a base line; "a horizontal surface" Antonyms: inclined - at an angle to the horizontal or vertical position; "an inclined plane" vertical, perpendicular - at right angles to the plane of the horizon or a base line; "a vertical camera angle"; "the monument consists of two vertical pillars supporting a horizontal slab"; "measure the perpendicular height" |
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