Noun

1. Someone who communicates by waving
2. The act of pausing uncertainly
3. The act of moving back and forth

Verb

1. Pause or hold back in uncertainty or unwillingness
2. Be unsure or weak
3. Move hesitatingly, as if about to give way
4. Move or sway in a rising and falling or wavelike pattern
5. Move back and forth very rapidly
6. Sway to and fro
7. Give off unsteady sounds, alternating in amplitude or frequency