Question

define oxidation in terms of oxidation number

Answer 1

The increase in oxidation state of an atom, through a chemical reaction, is known as an oxidation; a decrease inoxidation state is known as a reduction. Such reactions involve the formal transfer of electrons: a net gain in electrons being a reduction, and a net loss of electrons being an oxidation.

Answer 2

The addition of oxygen or the removal of carbon atom in a chemical reaction is know as oxidation.
E.g. C2 + o2 = co2.