Definition of subterrenean in US English:

subterrenean

adjective

  • Subterranean.

Origin

Mid 17th century; earliest use found in James Howell (?1594–1666), historian and political writer. Alteration of subterranean, after subterrene.

Pronunciation

subterrenean

/ˌsʌbtəˈriːnɪən/