- The definition of a nom de plume is a pen name, or a named used by an author to write instead of using his real name.
An example of a nom de plume is Samuel Clemens for Mark Twain.
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The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
nom de plume - Cultural Definition
French for “pen name”; an invented name under which an author writes. Mark Twain was the nom de plume of Samuel L. Clemens.