Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Late Latin
Origin: verticalis, from Latin vertex; VERTEX

vertical

1 adjective
     
Related topics: Maths, Organizations
ver‧ti‧cal1
1 pointing up in a line that forms an angle of 90° with a flat surface [≠ horizontal; ↪ diagonal]:
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
2BBSSO having a structure in which there are top, middle, and bottom levels:
Formal communication channels are usually vertical.
vertically adverb

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