…a small opening in a floor, wall, or roof allowing access from one area to another…
…(in fine art and technical drawing) shade (an area) with closely drawn parallel lines…
…(in drawing or graphics) shade (an area) with intersecting sets of parallel lines…
…a hatch for use as an emergency exit, especially from a submarine, ship, or aircraft…
…used to express friendly feelings towards one’s companions before drinking…
