Merriam-Webster's Collegiate® Dictionary, 11th Edition
CHILL
I. noun
Etymology: Middle English chile chill, frost, from Old English ciele; akin to Old English ceald cold Date: before 12th century
1. a sensation of cold accompanied by shivering, a disagreeable sensation of coldness, a moderate but disagreeable degree of cold, a check to enthusiasm or warmth of feeling ,
II. adjective
Date: 14th century
1. moderately cold, cold , raw , affected by cold , distant , formal , depressing , dispiriting , chillness noun
III. verb
Date: 14th century
intransitive verb
1. to become cold, to shiver or quake with or as if with cold, to become taken with a chill,
3. chill out , hang 12, transitive verb
1. to make cold or chilly , to make cool especially without freezing , to affect as if with cold ; dispirit , discourage , chillingly adverb