"Physical hunger" refers to the biological sensation our bodies experience when they need food for energy. It's the feeling that tells us we need to eat to satisfy our body's need for nourishment. Full definition
At each check in time, give yourself permission to eat outside of physical hunger. (juliedillonrd.com)
A good rule of thumb is to ask yourself if you would eat an apple in that moment, because the truth is, true physical hunger doesn't discriminate. (rachelmmolenda.com)
In contrast, appetite doesn't always stem from physical hunger. (cathe.com)