As a Verb or Adjective:
1. To use the same hand as most people in order to write, sign or do complicated actions. English = (be) right handed.
2. To have the steering wheel of a car located on the right side of the car. English = right hand drive.
Note:
1. Right-handed signers need to switch hand dominance to make this sign correctly, i.e., tap their right arm with their left hand.