extra - definition and synonyms

noun [countable] 

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  1. 1
    something that you can buy with something else for an additional payment

    The car comes with most extras that you’d expect, like twin air-bags.

    optional extra:

    A virus checker is available as an optional extra for your computer.

  2. 2
    cinema someone who has a very small part in a film, for example as a member of a crowd
     Synonyms and related words