A dramatic or sharp decrease; a sudden large drop in number or amount.
最近、観光客の数が激減した。
The number of tourists has sharply decreased recently.
新製品の不具合で売上が激減した。
Sales plunged sharply because of defects in the new product.
コロナ禍で外国人観光客が激減し、地元経済に打撃を与えた。
Foreign tourists dropped dramatically during the pandemic and dealt a blow to the local economy.