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English definition of “diagonal”

diagonal

adjective     /daɪˈæɡ.ən.əl/
A diagonal line is straight and sloping, not horizontal or vertical, for example joining two opposite corners of a square or other flat shape with four sides: The book has a diagonal black stripe on the cover.Describing angles, lines and orientations moving in a diagonal line: Peters received a diagonal pass and headed the ball into the net.Describing angles, lines and orientations diagonally     /-i/ adverb It's quickest if you cut diagonally across the park.Describing angles, lines and orientations
(Definition of diagonal adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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