What does the word daydream mean?

Usage examples for daydream

  1. Gussie, after the departure of P. K. Purvis, had fallen into a sort of daydream and was standing with his mouth open and his hands in his pockets. – Right Ho, Jeeves by P. G. Wodehouse
  2. And so, of course, she expected to find her young friend lying in a daydream, reluctantly awake. – The Rustle of Silk by Cosmo Hamilton