A person who borrows money or things from someone else; the borrower or debtor.
彼は車のローンの借り主だ。
He is the borrower on the car loan.
図書館の本の借り主を調べてください。
Please check who borrowed the library book.
借り主が支払いを滞らせたため、貸し主は法的手段に出た。
Because the borrower delayed payments, the lender took legal action.
A person who rents or leases a place or property; a tenant or lessee.
このアパートの借り主は学生が多い。
Many of the tenants in this apartment are students.
借り主は契約を更新するかどうかを来月決める予定だ。
The tenant plans to decide next month whether to renew the contract.
借り主として家賃を期日までに支払ってください。
As the tenant, please pay the rent by the due date.