Non-magic people were known by different denominations and nicknames across nations.

In the British wizarding world, the term "Muggle" was widely used to refer to a non-magic person. Some might consider it derogatory, but it was in fact often used affectionately. Arthur Weasley, for example, who had great fondness for Muggles and learning about them and their way of life, often used that term."Mudblood" was an extremely offensive and derogatory term referring to Muggle-borns and Muggles.

In the United States, they were known by the clipping No-Maj, whose plural may be either No-Majs or No-Majes. Other English-language terms for non-magic people included Can't-Spells and Non-Wizards.

In France, they were known as Non-Magiques, which was a simple translation of the term "non-magic".