noun
emergency; crisis; imminent danger
Refers to a critical situation requiring immediate action. Often used in compound nouns like 危急存亡 (life-or-death crisis) or 危急の際 (in case of emergency).
危急の際にはこのボタンを押してください。
In case of emergency, please press this button.
その国は危急存亡の危機に直面して
The country is facing a life-or-death crisis.
noun
Vulnerable (conservation status); VU
Obsolete term for the IUCN conservation status 'Vulnerable'. The modern standard term is 絶滅危惧 (ぜつめつきぐ) or more specifically 危急種 (ききゅうしゅ) in some contexts, but 危急 alone is no longer used this way.
See also: 絶滅危惧
古い文献では、危急が絶滅危惧の意味で使われることがある。
In older literature, 危急 is sometimes used to mean 'Vulnerable' in the conservation sense.
Compound of 危 (danger) and 急 (urgent). The word has been used in formal and literary Japanese to denote a critical emergency since at least the early modern period.