Credit (from Latin credit, "(he/she/it) believes") is the trust which allows one party to provide money or resources to another party where that second party does not reimburse the first party immediately (thereby generating a debt), but instead promises either to repay or return those resources (or other materials of equal value) at a later date. In other words, credit is a method of making reciprocity formal, legally enforceable, and extensible to a large group of unrelated people.
The resources provided may be financial (e.g. granting a loan), or they may consist of goods or services (e.g. consumer credit). Credit encompasses any form of deferred payment. Credit is extended by a creditor, also known as a lender, to a debtor, also known as a borrower.
Credit does not necessarily require money. The credit concept can be applied in barter economies as well, based on the direct exchange of goods and services. However, in modern societies, credit is usually denominated by a unit of account.
Bank issued credit makes up the largest proportion of credit in existence. The traditional view of banks as intermediaries between savers and borrower is incorrect. Modern banking is about credit creation. Credit is made up of two parts, the credit (money) and its corresponding debt, which requires repayment with interest. The majority (97% as of December 2013) of the money in the UK economy is created as credit. When a bank issues credit (i.e. makes a loan), it writes a negative entry into the liabilities column of its balance sheet, and an equivalent positive figure on the assets column; the asset being the loan repayment income stream (plus interest) from a credit-worthy individual. When the debt is fully repaid, the credit and debt are cancelled, and the money disappears from the economy. Meanwhile, the debtor receives a positive cash balance (which is used to purchase something like a house), but also an equivalent negative liability to be repaid to the bank over the duration. Most of the credit created goes into the purchase of land and property, creating inflation in those markets, which is a major driver of the economic cycle.