To come to one's senses; to regain awareness or mental clarity after being absorbed or distracted.
危ないところで我に返った。
I came to my senses just in time from a dangerous situation.
彼女はふと我に返り、部屋の散らかりに気づいた。
She suddenly came to her senses and noticed how messy the room was.
飲みすぎて眠っていたが、夜中に我に返った。
After drinking too much and falling asleep, he came to his senses in the middle of the night.
To calm down; to regain composure after being excited or agitated.
喧嘩の後、少しして彼は我に返った。
After the quarrel, he calmed down after a while.
深呼吸して我に返れば、冷静に対処できる。
If you take a deep breath and calm down, you can deal with it more rationally.
試験で失敗したが、すぐに我に返り次の科目に集中した。
He failed an exam but quickly pulled himself together and focused on the next subject.