Real Dictionary

backhand
variable noun: A backhand is a shot in tennis or squash, which you make with your arm across your body.

backhand in American English
done with the back of the hand turned inward, as for a baseball catch, or forward, as for a tennis stroke, and with the arm across the body
handwriting that slants backward, up to the left
to catch (a ball) with the back of the hand turned inward and arm extended across the body
with a backhand
adjective
noun: a stroke, slap, etc., made with the palm of the hand turned toward the body and the back of the hand turned in the direction of the stroke, slap, etc

backhand in British English
to play (a shot) backhand
adverb: with a backhand stroke
noun: a stroke made across the body with the back of the hand facing the direction of the stroke