diagonal


1di·ag·o·nal

adjective \dī-ˈa-gə-nəl, -ˈag-nəl\

of a straight line : joining two opposite corners of a shape (such as a square or rectangle) especially by crossing the center point of the shape

: not going straight across or up and down

Full Definition of DIAGONAL

1
a :  joining two vertices of a rectilinear figure that are nonadjacent or two vertices of a polyhedral figure that are not in the same face
b :  passing through two nonadjacent edges of a polyhedron <a diagonal plane>
2
a :  inclined obliquely from a reference line (as the vertical) <wood with a diagonal grain>
b :  having diagonal markings or parts <a diagonal weave>

Examples of DIAGONAL

  1. The blanket is covered with diagonal stripes.
  2. <the diagonal design ran up the wall all the way from the lower left to the upper right-hand corner>

Origin of DIAGONAL

Latin diagonalis, from Greek diagōnios from angle to angle, from dia- + gōnia angle; akin to Greek gony knee — more at knee
First Known Use: 1563

Other Mathematics and Statistics Terms

abscissa, denominator, divisor, equilateral, exponent, hypotenuse, logarithm, oblique, radii, rhomb

2diagonal

noun

: a diagonal line, direction, or pattern

Full Definition of DIAGONAL

1
:  a diagonal straight line or plane
2
a (1) :  a diagonal direction (2) :  a diagonal row, arrangement, or pattern
b :  something oriented in diagonal position
3
:  slash 4
on the diagonal
:  in an oblique direction :  diagonally

Examples of DIAGONAL

  1. a design with strong diagonals
  2. <the ramp was set at a low diagonal to make it easier for physically challenged patrons>

First Known Use of DIAGONAL

1571

Other Mathematics and Statistics Terms

abscissa, denominator, divisor, equilateral, exponent, hypotenuse, logarithm, oblique, radii, rhomb

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