From side to side; athwart; crosswise, or in a direction opposed to the length; quite over; as, a bridge laid across a river.

From side to side; crosswise; as, with arms folded across.

Obliquely; athwart; amiss; awry.

Toward the other side of the set. Ninety degrees from facing up or down. Neither toward the band nor away form it. see also top, bottom, side

placed crosswise; "spoken with a straight face but crossed fingers"; "crossed forks"; "seated with arms across"

to the opposite side; "the football field was 300 feet across"

over. The term usually relates conditions of fluid flow on one side of a piece of equipment to conditions on the opposite side (e.g., a pressure drop across a separator).