Define rancidity

Explanation: Rancidity is a broad term that refers to the rotting of food to the point where it becomes unfit for ingestion. The meal becomes rancid when the fats and oils in it oxidize, and the taste and smell of the food change as a result.

Oil, for example, might go rancid due to the decomposition of the lipids it contains, or milk can go rancid due to not heating it in a humid environment, and so on.

Final answer: Rancidity refers with spoilage of food.