What is the meaning of expense?

noun

• Amounts paid for goods and services that may be currently tax deductible (as opposed to capital expenditures.
  • synonyms: disbursal, disbursement
• A detriment or sacrifice.
  • usage: "at the expense of"
• Money spent to perform work and usually reimbursed by an employer.
  • usage: "he kept a careful record of his expenses at the meeting"

verb

• Reduce the estimated value of something.
  • usage: "For tax purposes you can write off the laser printer"
  • synonyms: write off, write down