intelligent

If someone or something is intelligent, they can learn, understand, reason, and respond well to new situations. The word suggests more than just remembering facts. It points to the ability to notice patterns, solve problems, make sense of information, and use knowledge in a useful way. We often use "intelligent" for people who learn quickly, think clearly, or show good judgment. For example: "She is an intelligent student who consistently earns top grades."

But the word is not limited to people. Animals can also be described as intelligent when they solve problems, learn from experience, or respond in surprisingly clever ways. Crows using tools to reach food and dolphins working together are common examples.

The term also extends to technology. We call systems intelligent when they seem to react, choose, or adjust in a smart way. A smart home that changes the temperature on its own might be called intelligent. In the same way, "artificial intelligence" (AI) refers to computer systems that carry out tasks that usually need human thinking, such as recognizing speech, finding patterns, or making decisions.

Sometimes, "intelligent" also suggests careful thought and good judgment. You might say someone made an "intelligent choice" if they looked at the options and chose wisely. It can also be used in an ironic way, though that is less common.

So whether you are talking about a person, an animal, or a piece of technology, "intelligent" usually describes an ability to think, learn, understand, and act in a capable way.