What does the word lark mean?

Usage examples for lark

  1. " Well, you know, as I was running here- Oh, girls, I had such a lark! – The Rebel of the School by Mrs. L. T. Meade
  2. I think it's a lark. – Patty's Social Season by Carolyn Wells
  3. But Irene, although she enjoyed the lark, had a respect for men at the bottom of it all, and would not always support Jenny in the latter's freely expressed contempt. – Carnival by Compton Mackenzie