1. Preferring to the use of the left foot, the left hand, and/or the left eye: When Joe was wrote on the blackboard in school or threw the baseball during the P.E. period, he made sinistral usage of his left hand, not his right hand.
2. Relating to or located on the left side, especially the left side of the body: Mark's stronger arm was not on the right part of his body, but on the sinistral side.