a usually illicit love affair
"[T]he story of John Tschirhart is one that you would only expect to see in a compelling, haunting movie about romance, amour, passion and heartbreak..." Dorian de Wind, The Huffington Post, Nov 9, 2010
About the word:
In 2010, a poll of linguists rated amour the French word for "love," simple and sweet the most romantic word in the world. In English, the word gains drama and loses innocence.