zagEnglishOxford New American Dictionaryzag /zaɡ, zæɡ / ▸ noun a sharp change of direction in a zigzag course: we traveled in a series of zigs and zags. ▸ verb (zags, zagging, zagged) [no object] make a sharp change of direction: a long path zigged and zagged through the woods. – ORIGIN late 18th century : shortening of zigzag.