seal Definition in Cambridge British English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Definition of "seal" - British English Dictionary

See all translations

sealnoun [C]

uk   us   /siːl/

seal noun [C] (ANIMAL)

B2 a large mammal that eats fish and lives partly in the sea and partly on land or ice
More examples

seal noun [C] (COVERING)

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. 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

seal noun [C] (MARK)

an official mark on a document, sometimes made with wax, that shows that it is legal or has been officially approved: The lawyer stamped the certificate with her seal.

sealverb [T]

uk   us   /siːl/

seal verb [T] (COVERING)

C2 to close an entrance or container so that nothing can enter or leave it 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!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.
More examples

seal verb [T] (MARK)

to make an agreement more certain or to approve it formally: The two leaders sealed their agreement with a handshake.
(Definition of seal from the Cambridge Advanced Learners Dictionary & Thesaurus © 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
poke

to greet someone on a social networking website by leaving them a special short message

Word of the Day

The cake was made by my sister: how to use the passive in English.
The cake was made by my sister: how to use the passive in English.
by Liz Walter,
June 24, 2015
Look at these two sentences: My sister made the cake. The cake was made by my sister. Both these sentences mean the same. The first is an active sentence: it tells you what the sister did. The second is a passive sentence: it tells you what happened to the cake. Here are

Read More 

burger noun
burger noun
June 29, 2015
a menu on a computer screen comprising three short parallel horizontal lines which the user clicks to see options Definitely use a burger. You could put the settings in the burger menu too. Fix the settings to the bottom of the burger menu and use a vertically scrolling contact list that scrolls behind

Read More