Did you know?

Click any word in a definition or example to find the entry for that word

seal  - definition and synonyms

 
 
Close

What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.

Close

Thesaurus

The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

more
noun [countable] seal pronunciation in British English /siːl/
Word Forms
Close
singularseal
pluralseals
  • Facebook
  • Twitter
  1. 1
    a large sea animal that eats fish and lives mainly in cold parts of the world. Seals are amphibious (=they can live both in water and on land). A young seal is called a pup.
  2. 2
    a piece of something such as wire or wax that seals a container and that you have to break before you can open the container
    1. a.
      a shaped piece of something such as rubber that closes a hole inside a machine so that air or other substances cannot get in or out

      I replaced the seal, but oil is still leaking out.

  3. 3
    a special mark that you put on something, for example a document, to show that it is legal or official

bit rot

when electronic information is lost because the software or devices needed to read it are no longer available

BuzzWord Article

Open Dictionary

troll factory

a company that pays its employees to write online comments in favour or against somebody or something posing as ordinary Internet users

add a word

Blog

A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog