This is how you sign Purpose in American Sign Language.

How to sign

To sign "Purpose" in American Sign Language (ASL), form a "1" handshape with your dominant hand. Touch the tip of your index finger to your temple. Next, extend it forward and downward, transitioning into a "V" handshape. Rest the "V" on your non-dominant palm with the fingertips pointing downwards. Finally, rotate the "V" handshape 90 degrees upward and tap your non-dominant palm once more.