motion (for) (one) to (do something)
To use body language to instruct or direct one to do something. She motioned to me to be quiet as I came into the room. I motioned for the stage assistant to lower the curtains.
motion (for) someone to do something
to give someone a hand signal to do something. The minister motioned the organist to begin playing. I motioned Ken to raise the curtain so the play could begin. Sally motioned for the waiter to bring the check. I will motion to the usher and try to get him to come over here and help us.