Definition of non-distinctive in US English:

non-distinctive

adjective

  • Not distinctive; (Linguistics) designating a feature of a spoken language whose replacement affects meaning.

Origin

Early 20th century; earliest use found in Daniel Jones (1881–1967), phonetician. From non- + distinctive.

Pronunciation

non-distinctive

/ˌnɒndɪˈstɪŋ(k)tɪv/