seal - definition in the American English Dictionary - Cambridge Dictionaries Online

Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “seal”

See all translations

seal

noun [C]  us   /sil/

seal noun [C] (ANIMAL)

a large, fish-eating mammal that has very thick fur and lives in the sea: Seals are sometimes hunted for their valuable fur.

seal noun [C] (OFFICIAL MARK)

an official mark on a document which shows that it is legal or actually what it claims to be: Diplomas are stamped with the state seal. A seal of approval means that something has been proven to be good or is very pleasing: My brother’s girlfriend got my mom’s seal of approval.

seal noun [C] (COVERING)

anything that prevents the escape of liquid or gas from a container or pipe: The oil seal broke, and all the oil leaked from the engine. Don’t use that jar of baby food if the seal is broken.

seal

verb [T]  us   /sil/

seal verb [T] (CLOSE)

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.

seal verb [T] (APPROVE)

to formally approve an agreement: They sealed the agreement with their signatures.
(Definition of seal from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of seal?
Add Cambridge dictionaries to your browser to your website

Definitions of “seal” in other dictionaries

Word of the Day

cost/charge the earth

to cost, charge, etc. a lot of money

Word of the Day

The language of elections

by Liz Walter,
April 22, 2015
On May 7th, citizens of the UK will be going to the polls (having an election) to decide who will form the next government. This kind of election is known as a general election. The country is divided into 650 areas, called constituencies. Each constituency elects a member of parliament (MP) to

Read More 

dumbwalking noun

April 20, 2015
walking slowly, without paying attention to the world around you because you are consulting a smartphone He told me dumbwalking probably wouldn’t be a long-term problem.

Read More