Also means
disaster (noun use)
Usage Note
sinistre as an adjective means gloomy or ominous. As a masculine noun, un sinistre is an insurance or civil-protection term for a disaster or major damaging event (fire, flood, accident). The two uses are common and a learner should know both — context usually makes it clear which is intended.
Examples
"L'atmosphère était vraiment sinistre."
Natural Translation
The atmosphere was truly sinister.

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