Huygens, Christiaan Syllabification: (Huy·gens, Christiaan)Pronunciation: /ˈhoigənz/Definition of Huygens, Christiaan (1629–95), Dutch physicist, mathematician, and astronomer. His wave theory of light enabled him to explain reflection and refraction. Huygens, Christiaan in other Oxford dictionaries Definition of Huygens, Christiaan in the British & World English dictionary