Definition of supervacaneous in English:

supervacaneous

adjective

rare
  • Unnecessarily or pointlessly added over and above what is essential; superfluous, redundant.

Origin

Late 16th century; earliest use found in Nicholas Harpsfield (?1519–1575), religious controversialist and historian. From classical Latin supervacāneus additional to what is required, superfluous, redundant (from super- + vacāre to be empty or void + -āneus see -aneous) + -ous.

Pronunciation

supervacaneous

/ˌsuːpəvəˈkeɪnɪəs/ /ˌsjuːpəvəˈkeɪnɪəs/