1. Definitions of oxidation and reduction and charascteristics with examples

2. Oxidation is gain of oxygen.
Reduction is loss of oxygen.
Because both reduction and oxidation are going on side-by-side, this is known as a redox reaction.

3. Oxidation is loss of hydrogen.
Reduction is gain of hydrogen.

4. Oxidation
the action or process of reacting with oxygen, especially the addition of oxygen to a substance.
the loss or removal of hydrogen from a substance.
the loss or removal of one or more electrons from a molecular entity, with or without concomitant loss or removal of a proton or protons. In this sense, oxidation is the opposite of, and is always coupled to, reduction.
the increase to a more positive value of the oxidation number of an atom, whether the atom is uncharged or charged, and whether free or covalently bound.

5. Reduction
Definition: A half-reaction in which a chemical species decreases its oxidation number, usually by gaining electrons.

6. Oxidation is loss of electrons.
Reduction is gain of electrons.