What is the meaning of crumb?

noun

• A very small quantity of something.
  • usage: "he gave only a crumb of information about his plans"; "there were few crumbs of comfort in the report"
• A person who is deemed to be despicable or contemptible.
  • usage: "only a rotter would do that"; "kill the rat"; "throw the bum out"; "you cowardly little pukes"; "the British call a contemptible person a `git'"
  • synonyms: rotter, dirty dog, rat, skunk, stinker, stinkpot, bum, puke, lowlife, scum bag, so-and-so, git
• Small piece of e. G. Bread or cake.

verb

• Coat with bread crumbs.
  • usage: "crumb a cutlet"
• Break into crumbs.
• Remove crumbs from.
  • usage: "crumb the table"