muggle Syllabification: (mug·gle)Pronunciation: /ˈməgəl/Definition of muggle noun informal a person who is not conversant with a particular activity or skill:this video game won’t appeal to mugglesOrigin: 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 British & World English dictionary