What does the word effusion mean?

Usage examples for effusion

  1. He rode along the ranks, at a walk, very slowly, showing his appreciation, and replying by a few simple and affectionate words to this effusion of popular joy; and cries of " Vive Bonaparte! – The Project Gutenberg Memoirs of Napoleon Bonaparte by Bourrienne, Constant, and Stewarton
  2. On the occasion of one of these applications for mercy, the following quaint correspondence passed between him and the Governor: Esteemed Friend, John Young: You mayst think this mode of address rather too familiar; but as it is the spontaneous effusion of my heart, and entirely congenial with my feelings, I hope thou wilt hold me excused. – Isaac T. Hopper by L. Maria Child
  3. This, the first article of a nation's creed, I learned upon those ramparts, where freedom was justly estimated, and the possession of the precious gift was purchased by the effusion of generous blood. – The American Union Speaker by John D. Philbrick