(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
an oblique line of squares of the same color on a checkerboard; "the bishop moves on the diagonals"
a line or cut across a fabric that is not at right angles to a side of the fabric
(geometry) a straight line connecting any two vertices of a polygon that are not adjacent
at an angle; especially 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"
one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock)
(theology) being determined in advance; especially the doctrine (usually associated with Calvin) that God has foreordained every event throughout eternity (including the final salvation of mankind)
with firmness and conviction; without compromise; "he stood foursquare for religious liberty and toleration"- C.G.Bowers; "dealt straightforwardly with all issues"
firmly and solidly; "hit the ball squarely"; "the bat met the ball squarely"; "planted his great bulk square before his enemy"
in a square shape; "a squarely cut piece of paper"; "folded the sheet of paper square"
directly and without evasion; not roundabout; "to face a problem squarely"; "the responsibility lies squarely with them"; "spoke forthright (or forthrightly) and to the point"
in a straight direct way; "looked him squarely in the eye"; "ran square into me"