king-emperor \ˈ ̷ ̷ˈ ̷ ̷( ̷ ̷) ̷ ̷\noun : a king who is also ruler of an empire; specifically: the British monarch in his onetime capacity as emperor of India < the darling of the Saxon king-emperors — F.H.Cramer > < the … king-emperor of one fourth of the world — Literary Digest >