How to correctly define anode and cathode? I am very much confused: in a simple voltaic cell ($\ce{Zn}$, $\ce{Cu}$ in $\ce{H2SO4}$), $\ce{Cu}$ is positively charged and is the anode, where in a Galvanic cell ($\ce{Zn}$ in $\ce{ZnSO4}$ and $\ce{Cu}$ in $\ce{CuSO4}$),
$\ce{Cu}$ is positively charged but is the cathode. How can I define it, where both are electric or voltaic cell?
Cathode is the electrode where the Reduction reaction takes place.  

Anode is the electrode where the Oxidation reaction takes place