hash mark

/HH AE1 SH M AA1 R K/
noun
  1. 1

    The hash or pound sign (#).

  2. 2

    (American football) An inbounds line.

  3. 3

    (ice hockey) Either of the parallel lines on either side of the face-off circles.

  4. 4

    A service stripe, as on an enlisteeโ€™s uniform sleeve.