What does the word lump mean?

Usage examples for lump

  1. Under such circumstances the lump will be scarcely affected by the operation. – Laboratory Manual of Glass-Blowing by Francis C. Frary
  2. A lump jumped into my throat; almost the tears were in my eyes. – The Promised Land by Mary Antin
  3. That's perfectly true, but there was still a little hard lump in the middle that would not break. – None Other Gods by Robert Hugh Benson