What is a loan?
A loan is money you borrow to buy or pay for something that you cannot afford to pay for up front.
You are assuming that over time you will be able to pay the money back.
Typically, you will also be charged interest on the loan, which is calculated by the agreed upon interest rate.
This interest charge will then be added to the original amount you borrowed, called the principal.
You will then repay the loan, both interest and principal, over an agreed amount of time based on the terms of the loan.