outgroups

/AW1 T G R UW1 P S/
noun
  1. 1

    The group of people who do not belong to one's own social group.

  2. 2

    In cladistics, all the taxa included in a study that do not belong to the ingroup that is of immediate interest.

Source: https://en.wiktionary.org/wiki/outgroup, https://en.wiktionary.org/wiki/outgroups