What does the word affair mean?

Usage examples for affair

  1. That is your affair. – The Woman in Black by Edmund Clerihew Bentley
  2. Yet, that is your affair! – Early Plays Catiline, The Warrior's Barrow, Olaf Liljekrans by Henrik Ibsen
  3. Her tears came: " My little sister, I'm on the man's side in this affair!" – Kincaid's Battery by George W. Cable