science
US /ˈsaɪ.əns/
UK /ˈsaɪ.əns/
1.
the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.
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The study of science is essential for understanding the world around us.
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She has a strong interest in natural science.
2.
a particular area of science, such as biology, chemistry, or physics.
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Computer science is a rapidly growing field.
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She specializes in environmental science.