From Longman Dictionary of Contemporary Englishpack iceˈpack ice noun [uncountable] SGDNa mass of ice floating in the sea
Examples from the Corpus
pack ice• The September-October northern limit of pack ice varies considerably from year to year.• Flotillas of tabular icebergs and ice islands sail among the pack ice.• They penetrate south to varying degrees, blue and minke whales often appearing well south of the pack ice edge.• Most adult male bears spend their lives out on the pack ice, living mainly on seals.• The pack ice and fast ice that spread over polar seas form vast sheets many hundreds of square kilometres in area. 