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English definition of “searchlight”

searchlight

noun [C]     /ˈsɜːtʃ.laɪt/ US  /ˈsɝːtʃ-/
a light with a very bright beam that can be turned in any direction, used especially to guard prisons or to see the movements of enemy aircraft in the skyLighting and light fittings in the home
(Definition of searchlight noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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