Definition from Wiktionary, the free dictionary
See also CHILL
Old English ċele.
chill (plural chills)
- 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 crimescene.
- The actor's eerie portrayal sent chills through the audience.
- His menacing presence cast a chill over everyone.
a moderate but penetrating sense of cold
a sudden numbing fear or dread
- Moderately cold or chilly.
- A chill wind was blowing down the street.
- (slang) Calm, relaxed, easygoing. See also: chill out.
- I'm pretty chill most of the time.
- Paint-your-own ceramics studios are a chill way to express yourself while learning more about your date's right brain.
- (slang) "Cool"; meeting a certain hip standard or garnering the approval of a certain peer group.
- That new movie was chill, man.
moderately cold or chilly
- (transitive) To lower the temperature of something; to cool.
- Chill before serving.
- (transitive, metallurgy) To harden a metal surface by sudden cooling.
- (intransitive) To become cold.
- In the wind he chilled quickly.
- (intransitive, metallurgy) To become hard by rapid cooling.
- (intransitive, slang) To relax, lie back.
- Chill, man, we've got a whole week to do it; no sense in getting worked up.
- The new gym teacher really has to chill or he's gonna blow a gasket.
- (intransitive, slang) To "hang", hang out; to spend time with another person or group. Also chill out.
- Hey, we should chill this weekend.
- (intransitive, slang) To smoke marijuana.
- On Friday night do you wanna chill?
Derived terms 
to lower the temperature of something; to cool
to harden a metal surface by sudden cooling
to become cold
to become hard by rapid cooling
to relax, lie back
Related terms 
- chill in The Century Dictionary, The Century Co., New York, 1911
- chill in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
Middle English 
- I will.
From English chill
- Det er chill.
- That's cool.
- Imperative of chille