Definition of “science” - English Dictionary

“science” in British English

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sciencenoun

uk /ˈsaɪ.əns/ us /ˈsaɪ.əns/

A2 [ U ] (knowledge from) the careful study of the structure and behaviour of the physical world, especially by watching, measuring, and doing experiments, and the development of theories to describe the results of these activities:

pure/applied science
Space travel is one of the marvels/wonders of modern science.

B1 [ C or U ] a particular subject that is studied using scientific methods:

physical sciences
Economics is not an exact science.
advances in medical science

A2 [ U ] the study of science:

a science course/lesson

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(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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sciencenoun

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)