What does the word mud mean?

Usage examples for mud

  1. The mud on your boots will work up into your mind, and instead of being full of great ideas for the future, you'll gradually forget all about them. – The Spinners by Eden Phillpotts
  2. They returned home wet through, smothered with mud, and feeling very important, like boys who had distinguished themselves. – The Ragged Trousered Philanthropists by Robert Tressell
  3. The mud is not a good place to fight in. – The Second Jungle Book by Rudyard Kipling