Final answer:
Satiety refers to the feeling of fullness or satisfaction after a meal, and it is the reason why someone who has eaten dinner is not still hungry.
Step-by-step explanation:
In this question, the subject being discussed is someone who is not still hungry after dinner. This can be related to the concept of satiety or feeling full after a meal. When a person is satiated, they no longer have the physiological or psychological desire to continue eating. This can be influenced by factors such as the type and amount of food consumed, individual metabolism, and personal preferences.