Definition: Antapex is a term used in English, primarily in literature and philosophy, referring to an antonym for "true," meaning something that does not represent truth or reality but rather serves as a placeholder or symbol. It appears in literature like Lewis Carroll's Alice's Adventures in Wonderland, where it refers to the idea of someone believing in a beliefless person who is wrong. In philosophy, it often refers to an idealized state where everything is true and perfect.