Dictionary.com
Thesaurus.com
Synonyms

chill

American  
[chil] / tʃɪl /

noun

  1. coldness, especially a moderate but uncomfortably penetrating coldness.

    the chill of evening.

  2. a sensation of cold, usually with shivering.

    She felt a slight chill from the open window.

  3. a feeling of sudden fear, anxiety, or alarm.

  4. sudden coldness of the body, as during the cold stage of an ague.

    fevers and chills.

  5. a depressing influence or sensation.

    His presence cast a chill over everyone.

  6. lack of warmth of feeling; unfriendliness; coolness.

  7. Foundry. an inserted object or a surface in a mold capable of absorbing large amounts of heat, used to harden the surface of a casting or to increase its rate of solidification at a specific point.

  8. bloom.


adjective

  1. moderately cold; tending to cause shivering; chilly.

    a chill wind.

  2. shivering with or affected by cold; chilly.

  3. depressing or discouraging.

    chill prospects.

  4. Slang. cool.

  5. unduly formal; unfriendly; chilly.

    a chill reception.

    Synonyms:
    stiff, hostile, aloof, cold

verb (used without object)

chills, present (3rd person singular) chilled, past participle, past chilling present participle
  1. to become cold.

    The earth chills when the sun sets.

  2. to be seized with a chill; shiver with cold or fear.

  3. Foundry. (of a casting) to become hard on the surface by contact with a chill or chills.

  4. Slang. to calm down; relax (often followed byout ).

verb (used with object)

chills, present (3rd person singular) chilled, past participle, past chilling present participle
  1. to affect with cold; make chilly.

    The rain has chilled me to the bone.

  2. to make cool.

    Chill the wine before serving.

  3. to depress; discourage; deter.

    The news chilled his hopes.

  4. Foundry. to harden the surface of (a casting) by casting it in a mold having a chill or chills.

  5. bloom.

  6. Slang. to kill; murder.

idioms

  1. take a chill pill, See chill pill.

chill British  
/ tʃɪl /

noun

  1. a moderate coldness

  2. a sensation of coldness resulting from a cold or damp environment, or from a sudden emotional reaction

  3. a feverish cold

  4. a check on enthusiasm or joy

  5. a metal plate placed in a sand mould to accelerate cooling and control local grain growth

  6. another name for bloom 1

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. another word for chilly

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. to make or become cold

  2. (tr) to cool or freeze (food, drinks, etc)

  3. (tr)

    1. to depress (enthusiasm, etc)

    2. to discourage

  4. (tr) to cool (a casting or metal object) rapidly in order to prevent the formation of large grains in the metal

  5. slang (intr) to relax; calm oneself

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Synonym Usage

See cold.

Other Word Forms

Derived Forms

Etymology

Origin of chill

First recorded before 900; Middle English chile, Old English cele, ci(e)le “coolness”; cf. cool, cold; akin to Latin gelāre “to freeze,” gelum “frost, cold,” glaciēs “ice” ( see gelato, gelid, glacier)

Explanation

A sharp burst of cold air or icy temperatures is a chill. The chill of a January day in New England might make you dream of moving to New Mexico. You'll feel a chill when someone opens a window in the winter, or notice a chill in the air on a cool day in September. Another kind of chill makes you shiver, but it's caused by illness and fever rather than a cold breeze: "Symptoms of the flu include chills and headache." A cold attitude is also a chill, as when a chill in the room makes you realize your friends are angry at each other.

Keep Reading on Vocabulary.com

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"Just, you know, chill, relax," Infantino told a news conference at the Azteca Stadium on the eve of Thursday's opening match between Mexico and South Africa.

From BBC • Jun. 10, 2026

Pratt’s loudest fans loathe modern-day L.A., and that should chill all other Angelenos.

From Los Angeles Times • Jun. 10, 2026

Ameriprise’s chief market strategist, Anthony Saglimbene, is chill about all the talk of who’s going to get squeezed.

From Barron's • Jun. 9, 2026

My suggestion — throw on your best headphones and find a shady tree to lean back against and chill out.

From Salon • Jun. 6, 2026

I drop it like it’s fire, watch it flutter to the floor while I count and breathe, count and breathe, forcing my hammering heart to chill out.

From "Red Flags and Butterflies" by Sheryl Azzam

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "chill" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com