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English definition of “diagonal”

diagonal

adjective     /daɪˈæɡənəl/
SLOPING A diagonal line is straight and sloping and not horizontal or vertical : a tie with diagonal stripes Describing angles, lines and orientations
SQUARE going from the top corner of a square to the bottom corner on the other side Describing angles, lines and orientations
diagonally adverb
(Definition of diagonal adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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