Definition of subbotnik in US English:

subbotnik

noun

Russian History
  • In the Soviet Union: a day, typically a Saturday, worked without pay for the benefit of the collective.

Origin

1920s (in an earlier sense). From Russian subbotnik a day, typically a Saturday, worked without pay for the benefit of the collective from subbota Saturday + -nik.

Pronunciation

subbotnik

/suːˈbɒtnɪk/