1To put something back in its original place or state; also used for turning back a clock's hands or restoring something to how it was.
読んだ本を棚に戻した。
I put the book I read back on the shelf.
冷凍した肉を冷蔵庫で戻した。
I defrosted the frozen meat in the refrigerator.
時計の針を一時間戻した。
I turned the clock's hands back one hour.
話を元に戻すと、さっきの件はどうなった？
Getting back to the topic, what happened with that matter from before?
2To throw up something one has eaten; to vomit.
気分が悪くて、食べたものを戻してしまった。
I felt sick and ended up throwing up what I'd eaten.
犬が散歩中に戻してしまった。
The dog threw up during the walk.
お酒を飲みすぎて戻しそうだ。
I drank too much and feel like I'm going to throw up.
3For a market price that had been falling to recover somewhat.
株価が一時下落した後、少し戻した。
After temporarily falling, stock prices recovered a bit.
円相場は午後に入って戻す動きを見せた。
The yen showed signs of recovering in the afternoon trading.