seal
/sil/ v [T] (CLOSE)Definition
› to close a container or opening, or to prevent the escape of a liquid or gas from something: Rubber seals jars tightly. He sealed the envelope and put a stamp on it. [M] Broiling with high heat seals in the flavor of the meat. [M] The police sealed off the area (= prevented people from entering it). › If official documents are sealed, they cannot be seen or are not available to the public.
(Definition of seal v (CLOSE) from the Cambridge Academic Content Dictionary
© Cambridge University Press)
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