(intransitive, slang) To relax or take time out; to calm down. / (intransitive, slang, somewhat dated) To hang out; spend time together with another person or group.

plural of chill pill

(meteorology) A measure of how cold the atmosphere feels, taking not just actual temperature into account, but also wind, which can make the air feel considerably colder at the same air temperature.

(informal) An imaginary medicine taken when excessively anxious or upset about a trivial matter.

(slang) A girlfriend considered by her boyfriend to be self-sufficient, "low-maintenance" and "chilled out".

plural of chill girl

(law, idiomatic) Uneasiness or unwillingness to speak publicly or to write about a matter, as a result of the threat or suggestion of a libel action should one do so.

Synonym of Big Freeze

plural of chill-out

Alternative spelling of chillout