A sensation is a feeling you get through your senses: touch, taste, smell, sight, or hearing. When you bite into a lemon, the sour taste creates a sharp sensation on your tongue. When you jump into a cold pool, the shock of the chilly water is an instant sensation across your whole body. The softness of a cat's fur, the brightness of lightning, the smell of fresh cookies: these are all sensations.

The word also describes something that causes great excitement or interest. When a new book becomes a sensation, everyone wants to read it and talk about it. A young athlete who breaks records might become a sensation in their sport. In this sense, the word suggests something so impressive or unusual that it captures widespread attention.

You might also hear the word sensational, which can mean either extremely good and exciting (a sensational performance in the school play) or exaggerated to grab attention (a sensational headline that makes a small problem sound huge). The core idea connects back to creating a strong feeling or impression, whether physical or emotional.