a. 1. With the hand turned backward; as, a backhanded blow. [ 1913 Webster ]

2. Indirect; awkward; insincere; sarcastic; as, a backhanded compliment. [ 1913 Webster ]

3. Turned back, or inclining to the left; as, backhanded letters. [ 1913 Webster ]

a. & adv. (Sport) Stroked with a backhand{ 2 }; as, a backhanded drive. [ PJC ]

n. State of being backhanded; the using of backhanded or indirect methods. [ 1913 Webster ]