an artificial light so directed or diffused as to give a comparatively uniform illumination over a rather large given area.
a lamp or projector that produces such a light.
verb (used with object), floodlighted or floodlit, floodlighting.
to light up or illuminate with a floodlight.

1920–25; flood + light1

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
floodlight (ˈflʌdˌlaɪt)
1.  a broad intense beam of artificial light, esp as used in the theatre or to illuminate the exterior of buildings
2.  the lamp or source producing such light
vb , -lights, -lighting, -lit
3.  (tr) to illuminate by or as if by a floodlight

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
The model number is located on the crossbar below the floodlight heads on a
  white sticker.
Put a motion sensor on your all-night garage floodlight.
Mounted floodlight facilities were installed so that the whole factory area
  could be lighted up as bright as day in case of alarm.
There is one floodlight mounted on the service pole that illuminates the
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