Meaning of VERTICAL in English

VERTICAL

I. ver ‧ ti ‧ cal 1 /ˈvɜːtɪk ə l $ ˈvɜːr-/ BrE AmE 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 OPP 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

II. vertical 2 BrE AmE noun

the vertical the direction of something that is vertical:

The tower now leans about 15 degrees from the vertical.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.