Eating is something that people do every day, but the word "dining" usually means a more special or formal way of eating.
When we talk about dining, it's not just grabbing a quick snack or having breakfast at home. We often use the word to describe going out to a restaurant with friends or family, where you sit down and order food from a menu. Dining can also mean a big party or event where people come together to enjoy good food and company. Think about a wedding reception, for example - that's a formal dinner with music and dancing, but it's still called dining because everyone is eating a meal together.
To eat; to eat dinner or supper.
Eating dinner as a social function.
