Anode is the positive-charged pole (wire or plate) in an electrolyzer (see def.) or battery. The electrode with the positive voltage. In an electrolyzer, this is where the oxygen is being produced.
An anode is an electrode through which electric current flows into a polarized electrical device.
In electrochemistry, the anode is where oxidation occurs, and is the positive polarity contact in an electrolytic cell. At the anode, anions (negative ions) are forced by the electrical potential to react chemically and give off electrons (oxidation) which then flow up and into the driving circuit.