What does the word riddle mean?

Usage examples for riddle

  1. 156. " Where a riddle is not intended, it is always a fault in allegory to be too dark." – The Grammar of English Grammars by Goold Brown
  2. But for six days they could not solve the riddle. – The Children's Bible by Henry A. Sherman Charles Foster Kent
  3. No. Only hold thy peace, as I shall hold mine, until such time as I can meet some one whom I can trust to read this riddle. – Unknown to History A Story of the Captivity of Mary of Scotland by Charlotte M. Yonge