What does the word levity mean?

Usage examples for levity

  1. She was of an extraordinary levity, and at that after staring at him a moment she broke into shrill laughter. – Historical Romances: Under the Red Robe, Count Hannibal, A Gentleman of France by Stanley J. Weyman
  2. In some conversation with him yesterday he did me the honour to say that I brought you back to his recollection by what he was pleased to call the mingled levity and obstinacy of my character. – Danger! and Other Stories by Arthur Conan Doyle