Definition of septcentenary in English:

septcentenary

noun

  • The seven-hundredth anniversary of a significant event.

adjective

  • Relating to a seven-hundredth anniversary.

Pronunciation:

septcentenary

/ˌsɛp(t)sɛnˈtɛn(ə)ri//ˌsɛp(t)sɛnˈtiːn(ə)ri/