n (sewing) The border of an article of clothing doubled back and stitched together to finish the edge and prevent it from fraying.
n In sheet metal design, a rim or edge folded back on itself to create a smooth edge and to increase strength or rigidity.
v (intransitive) (qualifier|in speaking) To make a sound like hem (usually coupled with "haw" as in "hem and haw | hemmed and hawed.")