Definition of pan-Slavonian in US English:

pan-Slavonian

adjective

rare
  • = pan-Slavic.

Origin

Mid 19th century; earliest use found in The Times. From pan- + Slavonian, after pan-Slavonism. Compare French panslavien.

Pronunciation

pan-Slavonian

/ˌpansləˈvəʊnɪən/