noninstitutional

/ˌnɑnɪnstɪˈtuʃənəl/
adjective
  1. Not belonging to or characteristic of an institution (such as a hospital, prison, or school); not formal or official.
    • They preferred a noninstitutional approach to education, with learning through play.
    • The noninstitutional setting of the small clinic made patients feel more comfortable.
    • The artist's studio had a noninstitutional feel, unlike a corporate office.
Synonyms