The neighbor or thing immediately to the left of someone or something (person, building, etc.).
左隣の店は先月閉店してしまった。
The shop to the left closed down last month.
会議室では左隣の席に資料を置いてください。
Please place the materials on the seat to your left in the meeting room.
ひだりどなりの家族とは普段から仲が良い。
We're usually on good terms with the family to our left.