Full Idea
An action is a bodily movement that is caused by intentional states such as beliefs, desires and so on.
Clarification
'Intentional' states are about something
Gist of Idea
Action is bodily movement caused by intentional states
Source
Mark Rowlands (Externalism [2003], Ch.5)
Book Reference
Rowlands,Mark: 'Externalism' [Acumen 2003], p.94
A Reaction
A useful definition, and clearly one that has no truck with attempts at giving behaviourist definitions of action. The definition of a 'moral action' needs to be built on this one. Particular types of belief and desire, presumably.