The difference between Perpendicular and Plumb

When used as nouns, perpendicular means a line or plane that is perpendicular to another, whereas plumb means a little mass of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction.

When used as adjectives, perpendicular means at or forming a right angle (to something), whereas plumb means truly vertical, as indicated by a plumb line.

Plumb is also adverb with the meaning: in a vertical direction.

Plumb is also verb with the meaning: to determine the depth, generally of a liquid.

check bellow for the other definitions of Perpendicular and Plumb

  1. Perpendicular as an adjective (geometry):

    at or forming a right angle (to something).

    Examples:

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

    "synonyms: normaorthogonal"

  2. Perpendicular as an adjective:

    Exactly upright; extending in a straight line toward the centre of the earth, etc.

  1. Perpendicular as a noun (geometry):

    a line or plane that is perpendicular to another

  2. Perpendicular as a noun:

    a device such as a plumb line that is used in making or marking a perpendicular line

  1. Plumb as an adjective:

    Truly vertical, as indicated by a plumb line.

  2. Plumb as an adjective (cricket):

    Describing an LBW where the batsman is hit on the pads directly in front of his wicket and should be given out.

  1. Plumb as an adverb:

    In a vertical direction; perpendicularly.

  2. Plumb as an adverb (informal):

    Squarely, directly; completely.

    Examples:

    "It hit him plumb in the middle of his face."

    "Years ago the well plumb dried out, not a drop of water in there since."

  1. Plumb as a noun:

    A little mass of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction.

  2. Plumb as a noun (nautical):

    A weight on the end of a long line, used by sailors to determine the depth of water.

  3. Plumb as a noun:

    The perpendicular direction or position.

  1. Plumb as a verb:

    To determine the depth, generally of a liquid; to sound.

  2. Plumb as a verb:

    To attach to a water supply and drain.

  3. Plumb as a verb:

    To think about or explore in depth, to get to the bottom of, especially to plumb the depths of.

  4. Plumb as a verb:

    To use a plumb bob as a measuring or aligning tool.

  5. Plumb as a verb:

    To accurately align vertically or horizontally.

  6. Plumb as a verb (dated):

    To seal something with lead.

  7. Plumb as a verb (intransitive):

    To work as a plumber.

  8. Plumb as a verb (rare):

    To fall or sink like a plummet.

  9. Plumb as a verb (US, colloquial, figuratively, obsolete):

    To trace a road or track; to follow it to its end.

  10. Plumb as a verb (nautical):

    To position vertically above or below.

  1. Plumb as a noun:

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