Penghu noun2 •Short for Penghu Island, the largest of the Pescadores, an archipelago in the Taiwan Strait, part of the Republic of China (Taiwan)The anchorage is at Mako (Makyū or Makun) on the principal island of Penghu. — 1911 •Short for Penghu Islands, the Pescadores collectively.In the Penghu Islands, the fourth agricultural region, scanty rainfall, poor soils, and strong winds, limit agricultural production to sweet potatoes and peanuts. — 1966