Definition: Antilog is a term in mathematics, specifically in the context of logarithmic functions. It's a special kind of inverse function that maps the input to its output. The term 'antilogarithm' comes from the Greek words antilogos (meaning "reverse") and logaritmo (from Latin, meaning "logarithm"). When used correctly and understood, antilogarithms are very useful in various fields such as physics, engineering, and information theory.