noun

• (tennis and other, racquet sports) A stroke made across the chest from the off-hand side to the racquet hand side; a stroke during which the back of the hand faces the shot.
  "She has a mean backhand."
• (Ultimate Frisbee) The standard throw; a throw during which the disc begins on the off-hand side and travels across the chest to be released from the opposite side.
• (surfing) The hand towards the back of the board.

adj

• (of handwriting) Slanting to the left.
  "In great confusion, Gordon accepted the letter, broke its small crested seal, and began reading the neat back-hand scrawl."
• (of strokes or throws) In the backhand style.
• (ice hockey, of a play) Using the back side of the hockey stick.
  "He scored on a backhand shot."