gold dustTranslate gold dust | into French | into Italian | into Spanish Definition of gold dust noun [mass noun] 1fine particles of gold. British a thing that is difficult to find or obtain:council nursery places are like gold dust 2a cultivated evergreen alyssum, with grey-green leaves and numerous small yellow flowers. Alyssum saxatile, family Cruciferae gold dust in other Oxford dictionaries Definition of gold dust in the US English dictionary