noun, noun or participle which takes 'suru', intransitive verb
Used as a noun or with する for something moving downward, or for a measured value such as air pressure dropping. More formal/technical than everyday 下がる or 落ちる.
機体は滑走路に向けて降下を始めた。
The aircraft began its descent toward the runway.
When a typhoon approaches, atmospheric pressure can drop suddenly.
noun, noun or participle which takes 'suru', intransitive verb
passing down an order; transmission of a decree
Rare formal use for an order, decree, or command being handed down from a higher authority to those below; often feels old-fashioned or bureaucratic.
古い軍事文書では、上官から命令が降下するという表現が見られる。
In old military documents, one can find the expression that orders are passed down from a superior officer.