American English

Definition of glacial adjective from the Oxford Advanced American Dictionary



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  1. 1[usually before noun] (geology) connected with the Ice Age the glacial period (= the time when much of the northern half of the world was covered by ice)
  2. 2(technology) caused or made by glaciers; connected with glaciers a glacial landscape glacial deposits/erosion
  3. 3(formal) very cold; like ice synonym icy glacial winds/temperatures the glacial waters of the Arctic The dining room was glacial.
  4. 4(formal) (of people) cold and unfriendly; not showing feelings synonym icy Her expression was glacial. Relations between the two countries had always been glacial.
  5. 5very slow The workers were making progress on the new house, but it was at a glacial pace.
See the Oxford Advanced Learner's Dictionary entry: glacial