I take it to mean "get most of your nutrition from plant-based sources". Some meat, dairy, etc. are ok if you want, but most of what you eat should be plant-bas

I take it to mean "get most of your nutrition from plant-based sources". Some meat, dairy, etc. are ok if you want, but most of what you eat should be plant-based food. Apart from grains, its hard to eat too much plant based food - whether measured in mass or calories.