to fall or push something down suddenly
The car plunged into the river after the crash.
事故の後、車は突然川に突っ込んだ。
to drop quickly and suddenly
Stock prices took a sharp plunge yesterday.
昨日、株価が急落した。
to go down steeply
The path makes a steep plunge toward the beach.
その小道は急勾配でビーチに向かって下っている。
to move up and down suddenly
Her heart felt a sudden plunge when she heard the news.
その知らせを聞いたとき、彼女の心は突然沈んだ。
a sudden fall or drop
The plane's sudden plunge scared all the passengers.
飛行機の急降下はすべての乗客を怖がらせた。
a sudden large decrease
There was a big plunge in temperature overnight.
一晩で気温が大きく下がった。
becoming involved in something new
His first plunge into politics was challenging but exciting.
彼の政治への初めての参入は挑戦的だったが、エキサイティングだった。
a jump or dive into water
She took a quick plunge in the pool to cool off.
彼女は涼むためにプールに素早く飛び込んだ。