Definition of motives:
(n) :
An incentive to act in a particular way; a reason or emotion that makes one want to do something; anything that prompts a choice of action.
(n) :
(law) Something which causes someone to want to commit a crime; a reason for criminal behaviour.
(v) :
(transitive) To prompt or incite by a motive or motives; to move.
(adj) :
Causing motion; having power to move, or tending to move
(adj) :
Relating to motion and/or to its cause
(n) :
(British) A party, gathering, or get-together.