Question

Provide two written definitions of an oxidation-reduction reaction

Answer 1

Oxidation is the loss of electrons. However, in contrast Reduction is the gain. You can learn this with the following to help:
O - Oxidation
I - Is
L - Loss
R - Reduction
I - Is
G - Gain

(OILRIG)

Answer 2

Oxidation is the loss of electrons while reduction is the gain of electrons. Oxidation is the addition of oxygen while reduction is the removal of oxygen.

Step-by-step explanation:

Oxidation and reduction can be defined in different ways. The common ways are

1) in terms of addition or removal of electrons

2) in terms of addition or removal of oxygen

3) in terms of addition or removal of hydrogen

4) in terms of increase or decrease in oxidation number.

All definitions are valid but their individual applications are context dependent.