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/ˈsɜːtʃˌlaɪt/ · noun
A light source that projects a bright beam of light in any direction, generally for military use..
A dozen air corps of fireflies searchlighted the spot for an instant.
Use searchlight when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Searchlight means A light source that projects a bright beam of light in any direction, generally for military use..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
A dozen air corps of fireflies searchlighted the spot for an instant.
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