Question

What do you mean by oxidation?

Answer 1

Redox reactions are oxidation-reduction chemical reactions in which the reactants go through a change of their oxidation states. The term 'redox' is a short term of reduction oxidation. All the redox responses can be separated into two unique cycles – a reduction reaction and an oxidation reaction. The oxidation and reduction reactions consistently happen at the same time in the redox reaction or Oxidation-Reduction reaction. The substance getting reduced in a chemical reaction is known as the oxidizing agent, while a substance that is getting oxidized is known as the reducing agent.

Complete answer:
Initially, the term oxidation was utilized to depict reactions where a component reacts with oxygen. Antoine Lavoisier previously utilized the term oxidation to explain a substance's reaction to oxygen. It was found a lot later that the product loses electrons after being oxidized, and the significance was summed up to remember all reactions for which electrons are lost, regardless of whether oxygen was included.
To frame the iron oxide known as rust, the iron metal is oxidized. In the meantime, it reduces oxygen. The reaction between magnesium metal and oxygen to shape magnesium oxide is another occasion of oxidation where a component reacts with oxygen. Any chemical reaction with electrons passing is oxidation. Indeed, it implies that the material that discharges electrons is oxidized.
$4Fe + 3{O_2} \to 2F{e_2}{O_3}$(Ferric oxide)
$2F{e_2}{O_3} + x{H_2}O \to F{e_2}{O_3}.x{H_2}O$(Rust) [Hydrated iron (III) oxide]

Note:
Oxidation including oxygen is the modern significance of the term oxidation. Likewise, there is another depiction of hydrogen that can be utilized in organic chemistry. This is the opposite of the idea of oxygen, and would thus be able to make confusion. It's as yet ideal to be careful about it. Oxidation is the loss of hydrogen, as per the depiction, while the reduction, in hydrogen acquisition.
An example of this is when ethanol is formed by oxidizing ethanol.
$C{H_3}C{H_2}OH \to C{H_3}CHO$