perpendicular in English

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adj. 1. standing straight up; upright.
Ex. The tree was leaning against the house and no longer perpendicular.
(SYN) vertical, erect.
2. very steep; precipitous.
Ex. a perpendicular cliff.
3. at right angles. One line is

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adv. perpendicularly.

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noun 1. a perpendicular line or plane.
Ex. The sagging walls of the old barn were no longer on the perpendicular.
2a. an upright or erect position.
Ex. Springing to her accustomed perpendicular like a bowed sapling (Thomas Hardy). english