For other uses, see Ignorance (disambiguation) . Ignorance is a state of being uninformed (lack of knowledge). The word ignorant is an adjective describing a person in the state of being unaware and is often used as an insult to describe individuals who deliberately ignore or disregard important information or facts.Ignoramus is commonly used in the UK, Ireland, and the US as a term for someone who is willfully ignorant.riter Thomas Pynchon articulated about the scope and structure of one's ignorance: Ignorance is not just a blank space on a person's mental map. It has contours and coherence, and for all I know rules of operation as well.