A moderate, but uncomfortable and penetrating coldness.

“There was a chill in the air.”

A sudden penetrating sense of cold, especially one that causes a brief trembling nerve response through the body; the trembling response itself; often associated with illness: fevers and chills, or susceptibility to illness.

“Close the window or you'll catch a chill.   I felt a chill when the wind picked up.”

An uncomfortable and numbing sense of fear, dread, anxiety, or alarm, often one that is sudden and usually accompanied by a trembling nerve response resembling the body's response to biting cold.

“Despite the heat, he felt a chill as he entered the crime scene.   The actor's eerie portrayal sent chills through the audience.   His menacing presence cast a chill over everyone.”

To lower the temperature of something; to cool

“Chill before serving.”

To become cold

“In the wind he chilled quickly.”

To harden a metal surface by sudden cooling

Moderately cold or chilly.

“A chill wind was blowing down the street.”

Unwelcoming; not cordial.

“Arriving late at the wedding, we were met with a chill reception.”

Calm, relaxed, easygoing.

“Paint-your-own ceramics studios are a chill way to express yourself while learning more about your date's right brain.”