Noun
The state or quality of being horizontal.
Source: Webster's dictionaryAll my work keeps going like a pendulum; it seems to swing back to something I was involved with earlier, or it moves between horizontality and verticality, circularity, or a composite of them. For me, I suppose that change is the only constant. Lee Krasner
houses with a pronounced horizontality Source: Internet
The Permian through Jurassic stratigraphy of the Colorado Plateau area of southeastern Utah is a great example of both Original Horizontality and the Law of Superposition. Source: Internet