seal 1 S3 / sil / 名词 [可数名词]

1 a large sea animal that eats fish and lives around coasts

2

a) a mark that has a special design and shows the legal or official authority of a person or organization :

The document carried the seal of the governor’s office.

b) the object that is used to make this mark

3 a piece of rubber or plastic that keeps air, water, dirt etc out of something

airtight/watertight seal

an airtight seal around the windows

4 a piece of wax , paper, wire etc that you have to break in order to open a container, document etc

5 seal of approval if you give something your seal of approval, you say that you approve of it, especially officially :

A number of employers have already given their seal of approval to the scheme.

6 set the seal on something British English to make something definite or complete :

In 1972, Nixon himself went to China to set the seal on the new relationship.