If what you are looking for is a paraphrase of the definition found in the dictionary for the purpose of an open-ended question, then look first at the key word: “Nourishment”.
For your answer, you may want to consider that nutrition is a process by which we provide nourishment to our bodies through the intake of minerals and nutrients found in food, or in dietary supplements. Nutrition is a necessary process to maintain our organs healthy enough to continue to perform their functions within our bodies. A good nutrition consists on the ingestion of supplements and food that provide the body with nutritional elements of primary importance. They include iron, potassium, vitamins, magnesium, zinc, and calcium. Contrarily, consuming food products that do not provide any nutritional value (for example, excess fats, oils, sugar, carbohydrates, and sodium) may lead to an adverse bodily reaction that may weaken our bodies to the point of physical and psychological illness. Therefore, a good nutrition is imperative for proper body functioning.
I hope this helps!!!