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English definition of “seal”

seal

verb [T] (COVERING)    /siːl/
C2 to close an entrance or container so that nothing can enter or leave itClosing and blocking to cover a surface with a special liquid to protect it: This floor has just been sealed (with varnish), so don't walk on it!Covering and adding layers C2 to close a letter or parcel by sticking the edges together: Seal the package (up) with sticky tape. He sealed (down) the envelope and put a stamp on it.Closing and blocking
(Definition of seal verb (COVERING) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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