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English definition of “seal”

seal

noun [C] (COVERING)    /siːl/
something fixed around the edge of an opening to prevent liquid or gas flowing through it: Clean the seal on/around the fridge door regularly so that it remains airtight .Coverings and layers a thin piece of material such as paper or plastic that covers the opening of a container and has to be broken in order to open the container and use the contents Coverings and layers
(Definition of seal noun (COVERING) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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