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English definition of “glacial”

glacial

adjective uk   /ˈɡleɪ.ʃəl/ us  

glacial adjective (ICE/COLD)

made or left by a glacier: glacial depositsSnow and iceCold extremely cold: glacial temperatures a glacial periodColdSnow and ice

glacial adjective (NOT FRIENDLY)

extremely unfriendly: She gave me a glacial smile/stare.Not being friendlyNot saying muchBlunt and direct in speech and behaviour
(Definition of glacial from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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