cross·wise in AM, also use crossways Crosswise means diagonally across something. Rinse and slice the courgettes crosswise. = diagonally
lying or extending across the length of a thing or in a cross direction; "a crosswise street"; "the crosswise dimension"
in the shape of (a horizontal piece on) a cross lying or extending across the length of a thing or in a cross direction; "a crosswise street"; "the crosswise dimension"