Directly means in a straight line or path, without stopping or turning aside. When you walk directly home from school, you take the shortest route without making detours to visit friends or stop at the park. When sunlight shines directly on your face, nothing blocks it or filters it: it travels straight from the sun to you.

The word also describes doing something without delay or intermediaries. If you speak directly to the principal instead of sending a message through your teacher, you're talking face-to-face with no one in between. When someone asks you a question and you answer directly, you give them the information they want right away, without avoiding the topic or dancing around it.

Something done directly is straightforward and immediate. A scientist might say that eating too much sugar directly affects your energy levels, meaning the connection is clear and immediate rather than complicated or uncertain. When someone says “I'll deal with this directly,” they mean they'll handle it right away, without putting it off or asking someone else to do it.