In a direction going diagonally across corners; at an angle through corners.
A compound adverb formed from 'corner' plus the directional suffix '-ways,' meaning in the manner or direction of corners. An older form compared to 'cornerwise.'
When people say something is placed 'cornerways,' they mean it's rotated so it points at the corner of the room—it's an old-fashioned way of saying 'diagonal!'
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