WordNet sense 1 (set down in writing in any of various ways):

written

WordNet sense 2 ((of handwriting) having the letters slanting from left down to right):

left-slanting

WordNet sense 3 ((of racket strokes) made across the body with back of hand facing direction of stroke):

backhanded

WordNet sense 4 (a return made with the back of the hand facing the direction of the stroke):

backhand shot, backhand stroke