1. a. : money lent at interest. took out a loan to pay for the new car. b. : something lent usually for the borrower's temporary use. 2. a. : the grant of temporary use. Can I have the loan of your car? b. : the temporary duty of a person transferred to another job for a limited time. He had been on loan to the navy during the war. 3. : loanword. More @Wikipedia
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