avant-garde

/AH0 V AA1 N T G AA1 R D/
noun
  1. 1

    The vanguard of an army or other force.

  2. 2

    Any group of people who invent or promote new techniques or concepts, especially in the arts.

adjective
  1. 1

    Innovative, pioneering, especially when extremely or obviously so.

    It was a very avant-garde production.

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Source: https://en.wiktionary.org/wiki/avant-garde