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expertise

n.
US //ˌɛkspɝˈtiz// UK //ˌɛkspətˈiːz// ex·per·tise
  1. 1 skill or knowledge (n.)
    B2 Upper Intermediate

    the high level of skill or knowledge you have in a particular subject.

    specialized skill or technical knowledge in a particular field. Usually uncountable, though occasionally used countably to refer to specific areas of mastery.

    Example

    The company hired her because of her expertise in digital marketing.

    Example

    The project required a high degree of technical expertise that few consultants in the region could provide.

    Usage

    Commonly followed by the preposition 'in'.
    Pitfall
    He has many expertises in computer science.
    He has a lot of expertise in computer science.

    Expertise is usually uncountable. To talk about specific skills, use 'areas of expertise' or 'skills' instead of the plural 'expertises'.

  2. 2 expert advice (n.)
    C1 Advanced Formal

    the advice or opinion given by an expert.

    the professional advice or formal opinion provided by a specialist or expert.

    Example

    We need to seek legal expertise before we sign this contract.

    Example

    The government relied on the expertise of independent scientists to draft the new environmental regulations.

    Teacher's tip

    In this sense, 'expertise' is often used as a more formal synonym for 'advice' or 'input' in professional settings.
Origin

Borrowed from French expertise.

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