to move one's hand to and fro to signal or greet
हाथ हिलाना
English Usage: He is waving goodbye as the bus departs.
Hindi Usage: वह बस के रवाना होने पर अलविदा कहते हुए हाथ हिला रहा है।
the act of moving one's hand back and forth in greeting or as a signal
English Usage: She gave a friendly waving to her friend across the street.
Hindi Usage: उसने सड़क के पार अपने दोस्त को हाथ हिलाते हुए नमस्कार किया।