Perpendicular definition

pûrpən-dĭkyə-lər
Being at right angles to the horizontal; vertical.
adjective
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The definition of perpendicular is something that is at right angles to something else.

An example of something that is perpendicular is a light post that is standing upright next to a street.

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(geometry) At or forming a right angle (to).

In most houses, the walls are perpendicular to the floor.

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Of or relating to a style of English Gothic architecture of the 1300s and 1400s, characterized by emphasis of the vertical element.
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(mathematics) A line or plane perpendicular to a given line or plane.
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A perpendicular position.
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A device, such as a plumb line, that is used in marking the vertical from a given point.
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A vertical or nearly vertical line or plane.
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At right angles to a given plane or line.
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Exactly upright; vertical; straight up or down.
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Very steep.
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Of or designating the third and latest style of English Gothic architecture of the 14th to the 16th cent., characterized by vertical lines in its tracery.
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In a perpendicular manner.
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A device used in finding or marking the vertical line from any point.
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A line at right angles to the plane of the horizon.
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A line or plane at right angles to another line or plane.
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A perpendicular or upright position.
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Intersecting at or forming a right angle or right angles.
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A line or plane that is perpendicular to a given line or plane.
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(geometry) A line or plane that is perpendicular to another.
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A device such as a plumb line that is used in making or marking a perpendicular line.
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(architecture) Of a style of English Gothic architecture from the fourteenth and fifteenth centuries.
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(mathematics) Intersecting at or forming right angles.
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In a perpendicular position.
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Other Word Forms

Noun

Singular:
perpendicular
Plural:
perpendiculars

Origin of perpendicular

  • Middle English perpendiculer from Old French from Latin perpendiculāris from perpendiculum plumb line from perpendere to weigh carefully per- per- pendere to weigh (s)pen- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Latin perpendiculum (“plumb line").

    From Wiktionary