Definition of chill adjective from the Oxford Advanced Learner's Dictionary

 

chill

 adjective
adjective
BrE BrE//tʃɪl//
 
; NAmE NAmE//tʃɪl//
 
 
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(formal) (especially of weather and the wind) cold, in an unpleasant way the chill grey dawn a chill wind Their breath steamed in the chill air. Word Origin Old English cele, ciele ‘cold, coldness’, of Germanic origin; related to cold.
See the Oxford Advanced American Dictionary entry: chill