Doing is the act of performing an action or making something happen. When you're doing your homework, riding your bike, or helping a friend, you're actively engaged in those activities, carrying them out in real time.

The word captures the difference between intention and action. You might spend all morning thinking about cleaning your room, but you're not actually doing it until you pick up that first toy or book. Scientists doing research are actively conducting experiments, measuring results, and recording observations. Athletes doing drills are practicing the specific movements their sport requires.

Doing often appears in phrases that distinguish action from talk. When someone asks “How are you doing?” they're asking about your current state or condition. When a teacher says “Less talking, more doing,” they want students to stop discussing the assignment and start working on it. The phrase “easier said than done” recognizes that accomplishing something often requires more effort than describing it.

The word can also mean getting along or managing: “She's doing well in her new school” means she's adjusting successfully and making progress.

As a noun, doing can also mean a deed or action, especially in the plural: “His doings got him into trouble.”