Definition of "Stern" :

noun: the rear part of a ship

noun: the fleshy part of the human body that you sit on

noun: United States concert violinist (born in Russia in 1920)

adjective: severe and unremitting in making demands

"A stern disciplinarian."

adjective: of a stern or strict bearing or demeanor; forbidding in aspect

"A stern face."

adjective: not to be placated or appeased or moved by entreaty

"The stern demands of parenthood."

adjective: severely simple