esnecy noun1 •(UK, no longer used) A prerogative given to the eldest coparcener (or whomever of the coparceners is so entitled by a court) to choose first after an inheritance is divided.When, in the fourteenth century, the estates of the Corbets were divided amongst their co-heirs, Caus Castle, being of the esnecy of the elder sister, passed to the Barons Stafford. — 1862