What is the meaning of consume?

verb

• Eat immoderately.
  • usage: "Some people can down a pound of meat in the course of one meal"
  • synonyms: devour, down, go through
• Serve oneself to, or consume regularly.
  • usage: "Have another bowl of chicken soup"; "I don't take sugar in my coffee"
  • synonyms: ingest, take in, take, have
• Spend extravagantly.
  • usage: "waste not, want not"
  • synonyms: squander, waste, ware
• Destroy completely.
  • usage: "The fire consumed the building"
• Use up (resources or materials. )
  • usage: "this car consumes a lot of gas"; "We exhausted our savings"; "They run through 20 bottles of wine a week"
  • synonyms: eat up, use up, eat, deplete, exhaust, run through, wipe out
• Engage fully.
  • usage: "The effort to pass the exam consumed all his energy"