He is eating lunch.

Meaning: This means that he is having his lunch, which is the meal that people usually have in the middle of the day.

Choice of Words: Eating is a verb that means to put food in your mouth and chew and swallow it. Lunch is a meal that is eaten in the middle of the day. When you put them together, "He is eating lunch" means that he is putting food in his mouth and chewing and swallowing it in the middle of the day.

Alternative Expressions

Related Expressions