noun
a photograph or movie shot taken at very close range
verb
to shut something or become shut
adjective
at a very short distance
adverb
in a position so as to be very near to someone or something
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The photographer took a close up shot of the flower to capture its intricate details.
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I love taking close up photos of my dog's face, he always looks so cute!
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Let's get close up to the stage so we can see the band better.
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When you examine the situation close up, you'll see all the nuances and complexities involved.