What is the meaning of drawing off?

noun

• Act of getting or draining something such as electricity or a liquid from a source.
  • usage: "the drawing of water from the well"
  • synonyms: drawing

verb

• Remove by drawing or pulling.
  • usage: "She placed the tray down and drew off the cloth"; "draw away the cloth that is covering the cheese"
  • synonyms: draw off, draw away, pull off
• Remove (a commodity) from (a supply source. )
  • usage: "She drew $2, 000 from the account"; "The doctors drew medical supplies from the hospital's emergency bank"
  • synonyms: withdraw, draw, take out, draw off