Meaning of “science” in the English Dictionary

"science" in English

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uk /ˈsaɪ.əns/ us /ˈsaɪ.əns/

(Definition of “science” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"science" in American English

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sciencenoun [ C/U ]

us /ˈsɑɪ·əns/

the systematic study of the structure and behavior of the natural and physical world, or knowledge obtained about the world by watching it carefully and experimenting:

[ U ] Advances in medical science mean that people are living longer.
[ U ] She shows a talent for math and science.

Sciences are also particular areas of science, such as biology, chemistry, and physics.

Science also refers to subjects which are studied like a science:

(Definition of “science” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"science" in Business English

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uk /saɪəns/ us

[ U ] the careful study of the structure and behaviour of the world, especially by doing experiments:

pure/applied science
Space travel is one of the wonders of modern science.
Advances in science and technology are opening the way for new treatments.
a science teacher/degree

[ U ] a subject that is studied using scientific methods:

medical/forensic science

[ C ] a subject such as physics, chemistry, or biology:

He studied sciences at California Institute of Technology.

(Definition of “science” from the Cambridge Business English Dictionary © Cambridge University Press)