Shrug or wave (7)
I believe the answer is:
gesture
I believe this is a double definition.
'shrug' is the first definition.
(I know that shrug is a more specific form of gesture)
'wave' is the second definition.
(waving is a type of gesture)
(Other definitions for gesture that I've seen before include "Hand motion" , "Message through movement" , "Expressive motion" , "A physical motion or signal" , "Significant movement" .)