Meaning of VERTICAL in English

VERTICAL

/ ˈvɜːtɪkl; NAmE ˈvɜːrt-/ adjective , noun

■ adjective

1.

( of a line, pole, etc. ) going straight up or down from a level surface or from top to bottom in a picture, etc.

SYN perpendicular :

the vertical axis of the graph

The cliff was almost vertical.

There was a vertical drop to the ocean.

—compare horizontal

2.

having a structure in which there are top, middle and bottom levels :

a vertical flow of communication

►  ver·ti·cal·ly / -kli; NAmE / adverb

■ noun

(usually the vertical ) a vertical line or position

SYN perpendicular :

The wall is several degrees off the vertical.

••

WORD ORIGIN

mid 16th cent. (in the sense directly overhead ): from French , or from late Latin verticalis , from vertex whirlpool, crown of a head, vertex , from vertere to turn.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.