noun the act of adorning, embellishing, or honoring; ornamentation.
2. decoration ·noun that which adorns, enriches, or beautifies; something added by way of embellishment; ornament.
3. decoration ·noun specifically, any mark of honor to be worn upon the person, as a medal, cross, or ribbon of an order of knighthood, bestowed for services in war, great achievements in literature, art, ·etc.