no·men \ˈnōmən\noun (pluralnom·i·na \ˈnämənə, ˈnōm-\) Etymology: Latin — more at name 1.: name < no longer a nomen of bitter sarcasm — Gertrude Atherton > 2.: the name of the gens being the second of the three usual names of a person among the ancient Romans — compare agnomen, cognomen, praenomen 3.: a grammatical form with the functions of a noun : noun, substantive