Down

a.
  1. Downcast; as, a down look.
  2. Downright; absolute; positive; as, a down denial.
  3. Downward; going down; sloping; as, a down stroke; a down grade; a down train on a railway.
    4. Down draught ,
    a downward draft, as in a flue, chimney, shaft of a mine, etc.
    Down in the mouth, Down at the mouth
    chopfallen; dejected.