Borrower/ˈbɔːrəʊər/ Definition 1 of 2Pro Tip 1/3Temporal Possession Borrower implies temporary possession with the intention to return the item. I'm just a borrower of this book; I'll return it next week. Pro Tip 2/3Not Ownership The borrower does not own the item, merely uses it for a time. As a borrower of the car, she couldn't sell it. Pro Tip 3/3Consensual Agreement Both the lender and borrower must agree on the borrowing terms. He became a borrower after agreeing to the owner's conditions.