zagEnglishOxford Dictionary of Englishzag /zaɡ / ▸ noun a sharp change of direction in a zigzag course: we travelled 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.