Made of gold; consisting of gold.Of the color or luster of gold; yellow; bright; shining; splendid: as, the golden sun; golden fruit: sometimes poetically used of blood.Hence Excellent; most valuable; very precious: as, the golden rule.Most happy or prosperous; marked by great happiness, prosperity, or progress: as, the golden age.Preëminently favorable or auspicious: as, a golden opportunity.In arithmetic, the rule of three. See rule.To become golden in color.