action

1 : the process of exerting a force or bringing about an effect that results from the inherent capacity of an agent <protein synthesis is an expression of gene action> <insecticidal action>
2 : a function or the performance of a function of the body (as defecation) or of one of its parts <the normal baby has three or four actions of the bowel in 24 hours—Morris Fishbein> <heart action>
3 : an act of will
4 actions pl : behavior <aggressive actions>