dauphin meaning in English — dauphin, dolphin

English meaning

dauphin noun Historically, the title given to the eldest son and heir of the King of France.
dolphin noun A highly intelligent, social marine mammal with a beak-like snout, known for its playfulness.

dauphin is used for these senses in English:

Delphinus (constellation) A small summer constellation of the northern sky, said to resemble a dolphin. It lies between the constellations Cygnus and Aquila.
dauphin The eldest son of the king of France. Under the Valois and Bourbon dynasties, the Dauphin of France, generally shortened to Dauphin, was heir apparent to the throne of France. The title derived from the main title of the Dauphin, Dauphin of Viennois.
dolphin A carnivorous aquatic mammal in one of several families of the infraorder Cetacea, famed for its intelligence and occasional willingness to approach humans.

noun A highly intelligent, social marine mammal with a beak-like snout, known for its playfulness.
noun A large, brightly coloured game fish also known as mahi-mahi or dorado (unrelated to the mammal).

duc-d'Albe