General English

  • noun a way of describing something by giving it the qualities of something else, as in ‘our eagle-eyed readers soon spotted the mistake.’

Information & Library Science

  • noun an expression used to describe one thing in terms of another, without using the words ‘like’ or ‘as’, as in ‘the librarian was a fountain of knowledge’

Media Studies

  • noun the application of a word or phrase to somebody or something that is not meant literally but to make a helpful comparison