When you chill something or when it chills, you lower its temperature so that it becomes colder but does not freeze.

When cold weather or something cold chills a person or a place, it makes that person or that place feel very cold.

If you say that something you see, hear, or feel chills you, you mean that it frightens you.

If something sends a chill through you, it gives you a sudden feeling of fear or anxiety.

A chill is a mild illness which can give you a slight fever and headache.

Chill weather is cold and unpleasant.