It depends whom you ask and what other terms they use with it. Generally, a plant-based diet means it includes a large amount of plant-foods (e.g. beans, whole grains, nuts, seeds, fruits, veggies, roots, and tubers). A plant-based diet limits the amount of animal products (e.g. Meat, poultry, eggs, dairy, butter, fish) in one’s diet or excludes it all together. Whole foods, plant-based diet generally means it contains little to no refined foods (e.g. white flour, added sugars, oils), and focuses on foods in their most whole form (e.g. avocados instead of avocado oil or whole grains rather than white flour).