Definition of out-group in US English:

out-group

noun

  • 1Sociology
    Those people who do not belong to a specific in-group.

    • ‘In academic psychology, we talk of in-groups and out-groups.’
    • ‘Racialized discourse is a set of social practices that favours the ingroup and denigrates the out-group, categorizing, evaluating and differentiating between groups.’
    • ‘But the authoritarian adult is the kind of person whose view of the social world is extremely highly structured, and the structure is very much based on considerations of power strength, of in-groups and out-groups.’
    • ‘Language communicates, but it also divides-people from people, caste from caste, in-group from out-group.’
    • ‘The world is divided into in-groups and out-groups, with those who are different seen as enemies to be conquered or destroyed.’
  • 2Biology
    A group of organisms not belonging to the group whose evolutionary relationships are being investigated.

    • ‘An out-group was available for phylogenetic analysis.’
    • ‘With this test, we can determine if rates of molecular evolution are the same for two different taxa by comparing how divergent they are from a known out-group.’
    • ‘The riverine group includes a small number of species and thus may serve as an out-group for comparison purposes.’
    • ‘Loligo bleekeri was used as the out-group in all phylogenetic analyses because most authors currently consider cephalopods as the sister group of gastropods.’
    • ‘The plant mariner-like elements were used as a monophyletic out-group, a position suggested by previous analyses.’

Pronunciation

out-group

/aʊt ɡrup/