What does the word clap mean?

Usage examples for clap

  1. Sure whil'st I was talking with Mr. Tradewell, I heard my Door clap. – The Busie Body by Susanna Centlivre Commentator: Jess Byrd
  2. But, gentle as the words were, they had the same effect on the unhappy governor as a clap of thunder. – Louise de la Valliere by Alexandre Dumas, Pere