tailingEnglishOxford Dictionary of Englishtailing /ˈteɪlɪŋ / ▸ noun 1 (tailings) the residue of something, especially ore: tailings from the mine may contaminate local waterways. ▪ [mass noun] grain or flour of inferior quality. 2 [mass noun] the action of cutting the stalks or ends off fruit or vegetables: the green beans only needed topping and tailing. 3 the part of a beam or projecting brick or stone embedded in a wall.