vertical
[adjective]
Synonyms: upright, erect, on end, perpendicular

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Antonyms: horizontal
Contrasted words: flat, plane
Related Words: erect, upright, steep, up-and-down

[TahlilGaran] English Synonym Dictionary ▲

I. ver‧ti‧cal¹ /ˈvɜːtɪkəl $ ˈvɜːr-/ adjective
[Date: 1500-1600; Language: Late Latin; Origin: verticalis, from Latin vertex; ⇒ vertex]

1. pointing up in a line that forms an angle of 90° with a flat surface Antonym : horizontal ⇒ diagonal:
a vertical line
the vertical axis of a graph
vertical window blinds
vertical cliff/climb/drop etc (=one that is very high or steep)
a gorge lined with vertical cliffs

2. having a structure in which there are top, middle, and bottom levels ⇒ hierarchical:
Formal communication channels are usually vertical.
—vertically /-kli/ adverb

[TahlilGaran] Dictionary of Contemporary English ▲

II. vertical² noun
the vertical the direction of something that is vertical:
The tower now leans about 15 degrees from the vertical.

[TahlilGaran] Dictionary of Contemporary English ▲