1Back; behind; rear — the position or area at the back of something or someone.
犬が私の後ろをついてきた。
A dog followed behind me.
部屋の後ろに窓がある。
There is a window at the back of the room.
彼は列の後ろに並んだ。
He stood at the back of the line.
彼女は後ろを振り返って手を振った。
She looked back and waved her hand.