1A fall or decline in value, price, or quantity; often used for stock prices, land prices, exchange rates, etc. (can be used with 下落する).
昨夜の急激な売りで株価が大幅に下落した。
Due to heavy selling last night, stock prices fell sharply.
地価の下落で住宅ローンの審査が厳しくなった。
Because of the decline in land prices, mortgage screenings have become stricter.
円高で輸出企業の収益が下落するおそれがある。
With a stronger yen, there is a risk that exporters' profits will decline.
気温の下落で山間部では雪になるだろう。
With the drop in temperature, it will likely turn to snow in the mountainous areas.