mugglePronunciation: /ˈmʌg(ə)l/Definition of muggle noun informal a person who is not conversant with a particular activity or skill:she’s a muggle: no IT background, understanding, or aptitude at allOrigin: 1990s: from mug1 + -le2; used in the Harry Potter books by J. K. Rowling to mean 'a person without magical powers'muggle in other Oxford dictionaries Definition of muggle in the US English dictionary