Bore, a watery ridge rushing violently up an estuary, due to a strong tidal wave travelling up a gradually narrowing channel. Bores are common in the estuary of the Ganges and other Asiatic rivers, in those of Brazil, and at the mouth of the Severn, in England.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Bordone * Boreas