Meaning of きゅうへん in Japanese

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Definition of きゅうへん

きゅうへん(kyuuhen) 【急変】

(n, vs) sudden turn; sudden change
事態は急変した。
There was a sudden change in the situation.
(suddenly occurring) accident; emergency
サイレンが急変を知らせました。
The siren sounded an emergency.

えんきゅうへんすう(enkyuuhensuu) 【永久変数】