If readers are unfamiliar with a word, a phrase, or an idea important to your topic, you must explain it for them. If your argument depends on a key term with multiple connotations, you must explain the exact way that you are using the term. Quoting or paraphrasing a source can help you define terms and concepts in neutral, accessible language.

Harba defines “refined grains” as part of her claim that the typical American diet is getting less healthy over time.

A diet that is low in nutritional value and high in sugars, fats, and refined grains—grains that have been processed to increase shelf life but that sacrifice fiber, iron, and B vitamins—can be damaging over time (United States, Dept. of Agriculture and Dept. of Health and Human Services 36).