Definition of "quinzain" []

• In chronology, the fourteenth day after a feast-day, or the fifteenth if the day of the feast is included. (noun)
• A stanza consisting of fifteen lines. (noun)
• A period of fifteen days (in modern calculation fourteen, leaving out the day of the feast) after a church festival, on the principle of the octave of a feast: as, the quinzain of Easter. (noun)
• Some event, social or other, which occurs every two weeks. (noun)

The Century Dictionary (Public Domain)