What is the term for an elaborate decoration or covering, often for horses?

The term "caparison" refers to a decorative covering or garment, particularly one used on horses, often for ceremonial or festive purposes. This word is derived from the Latin "cappa," meaning cloak, and typically implies an ornamental or luxurious aspect. Caparisons can be richly embroidered or adorned, enhancing the horse’s appearance during parades or special events.

The other choices do not relate to decorative coverings for animals. "Countenance" refers to a person's visage or facial expression. "Defalcate" is a financial term meaning to embezzle or misappropriate funds. "Cozen" means to deceive or trick someone, which is unrelated to the concept of decoration.