Definition of diagonal Diagonal

/dajæˈgʌnʌl/ - [dayatgunul] - di•ag•o•nal

We found 23 definitions of diagonal from 7 different sources.

What does diagonal mean?

WordNet

Noun Plural: diagonals
diagonal - (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry
		set several exercises intended to be done in series; "he did four sets of the incline bench press"
		square matrix a matrix with the same number of rows and columns
		math, mathematics, maths a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement
diagonal - an oblique line of squares of the same color on a checkerboard; "the bishop moves on the diagonals"
		line acting in conformity; "in line with"; "he got out of line"; "toe the line"
		line acting in conformity; "in line with"; "he got out of line"; "toe the line"
		checker board, checkerboard a board having 64 squares of two alternating colors
		main diagonal, principal diagonal the diagonal of a square matrix running from the upper left entry to the lower right entry
diagonal - (geometry) a straight line connecting any two vertices of a polygon that are not adjacent
		straight line a line traced by a point traveling in a constant direction; a line of zero curvature; "the shortest distance between two points is a straight line"
		geometry the pure mathematics of points and lines and curves and surfaces
diagonal - a line or cut across a fabric that is not at right angles to a side of the fabric
		bias
		straight line a line traced by a point traveling in a constant direction; a line of zero curvature; "the shortest distance between two points is a straight line"
diagonal - a punctuation mark (/) used to separate related items of information
		solidus, slash, virgule, stroke, separatrix
Adjective
diagonal - connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face; "a diagonal line across the page"
		oblique slanting or inclined in direction or course or position--neither parallel nor perpendicular nor right-angled; "the oblique rays of the winter sun"; "acute and obtuse angles are oblique angles"; "the axis of an oblique cone is not perpendicular to its base"
diagonal - having an oblique or slanted direction
		aslant, aslope, slanted, slanting, sloped, sloping
		inclined at an angle to the horizontal or vertical position; "an inclined plane"

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Wiktionary

diagonal (Noun)
Something arranged diagonally or obliquely.
diagonal (Noun)
A line or cut across a fabric that is not at right angles to a side of the fabric.
diagonal (Noun)
A punctuation mark used to separate related items of information.
diagonal (Noun)
A diagonal line or plane.
diagonal (Noun)
A line joining non- adjacent vertices of a polygon.
diagonal (Adjective)
Joining two nonadjacent vertices of a polygon or polyhedron.
diagonal (Adjective)
Having a slanted or oblique direction, lines or markings.
diagonal (Adjective)
Pertaining to the front left and back right or the front right and back left legs of a quadruped.

Webster DictionaryWebster's Unabridged Dictionary 📘

diagonal (a.)
Joining two not adjacent angles of a quadrilateral or multilateral figure; running across from corner to corner; crossing at an angle with one of the sides.
diagonal (n.)
A right line drawn from one angle to another not adjacent, of a figure of four or more sides, and dividing it into two parts.
diagonal (n.)
A member, in a framed structure, running obliquely across a panel.
diagonal (n.)
A diagonal cloth; a kind of cloth having diagonal stripes, ridges, or welts made in the weaving.

OmegaWiki DictionaryOmegaWiki Dictionary Ω

diagonal
A line joining two nonconsecutive corners of a polygon or polyhedron.

Chambers DictionaryChamber's 20th Century Dictionary 📕

diagonal
dī-ag′o-nal, adj. through the corners, or from an angle to an opposite angle of a four or many sided figure.—n. a straight line so drawn.—adv. Diag′onally.—Diagonal scale, a scale for laying down small fractions of the unit of measurement, the parallel lines drawn lengthwise on its surface being divided into sections by lines drawn crosswise, and in one end section being intersected by a series of other parallel lines drawn obliquely at equal distances across them. [Fr.,—L. diagonalis, from Gr. diagōnios—dia, through, and gōnia, a corner.]

Wikipedia

Diagonal is a kind of straight line. A diagonal line does not go straight up, down, or across.

In mathematics, "diagonal" has different meanings. For example, in geometry a diagonal is any line that goes between the corners of a polygon. So a square has two diagonals, and a five-sided shape has five diagonals.