exponent - definition and synonyms

noun [countable] 

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  1. 1
    formal someone who tries to persuade other people to support an idea, theory, political plan etc
    exponent of:

    a leading exponent of free trade

  2. 2
    someone who is very good at a particular skill or activity and is an example to other people
    exponent of:

    the leading exponent of this style of architecture

  3. 3
    maths a small number or letter written above and to the right of another number to show how many times you should multiply that number by itself