n.
1.an active and efficient cause
2.a substance that exerts some force or effect
3.a representative who acts on behalf of other persons or organizations
4.a businessman who buys or sells for another in exchange for a commission
5.any agent or representative of a federal agency or bureau
6.the semantic role of the animate entity that instigates or causes the hapening denoted by the verb in the clause
Idiom of the Day
have second thoughts about (someone or something)
to have doubts about someone or something
Recently, I am having second thoughts about buying a new motorcycle.