science

American  

[sahy-uhns] / ˈsaɪ əns /

noun

1. a branch of knowledge or study dealing with a body of facts or truths systematically arranged and showing the operation of general laws.

   the mathematical sciences.

2. systematic knowledge of the physical or material world gained through observation and experimentation.

3. any of the branches of natural or physical science.

4. systematized knowledge in general.

5. knowledge, as of facts or principles; knowledge gained by systematic study.

6. a particular branch of knowledge.

7. skill, especially reflecting a precise application of facts or principles; proficiency.

   Synonyms:

   discipline, method, technique, art

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science British  

/ ˈsaɪəns /

noun

1. the systematic study of the nature and behaviour of the material and physical universe, based on observation, experiment, and measurement, and the formulation of laws to describe these facts in general terms

2. the knowledge so obtained or the practice of obtaining it

3. any particular branch of this knowledge

   the pure and applied sciences

4. any body of knowledge organized in a systematic manner

5. skill or technique

6. archaic knowledge

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science Scientific  

/ sī′əns /

1. The investigation of natural phenomena through observation, theoretical explanation, and experimentation, or the knowledge produced by such investigation.

2. ◆ Science makes use of the scientific method, which includes the careful observation of natural phenomena, the formulation of a hypothesis, the conducting of one or more experiments to test the hypothesis, and the drawing of a conclusion that confirms or modifies the hypothesis.

3. See Note at hypothesis

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Usage

Spelling tips for science The word science is hard to spell for two reasons. It uses two letters to make an [ s ] sound, sc-. It is also an exception to the classic rule: I before E, except after C. In this case, the rule does not apply. How to spell science: First, remember that you learn science in school, another hard word to spell that also starts with sc. Second, remember that science doesn't follow the classic “I before E except after C” rule because the i is pronounced separately from the e that follows it (resulting in a two-syllable word), instead of being pronounced together as a single vowel sound.

Other Word Forms

• antiscience adjective
• interscience adjective
• nonscience noun
• proscience adjective
• subscience noun

Etymology

Origin of science

First recorded in 1300–50; Middle English, from Middle French, from Latin scientia “knowledge,” equivalent to scient- (stem of sciēns “knowing,” present participle of scīre “to know”) + -ia -ia

Explanation

Science is the field of study concerned with discovering and describing the world around us by observing and experimenting. Biology, chemistry, and physics are all branches of science. Science is an "empirical" field, that is, it develops a body of knowledge by observing things and performing experiments. The meticulous process of gathering and analyzing data is called the "scientific method," and we sometimes use science to describe the knowledge we already have. Science is also what's involved in the performance of something complicated: "the science of making a perfect soufflé."

Example Sentences

This unexpected finding opens the door to new lines of research in quantum science and technology.

From Science Daily • Apr. 14, 2026

In practice, critics say, the phrase has become shorthand for science in which preferred outcomes outweigh inconvenient evidence.

From Los Angeles Times • Apr. 14, 2026

While it's not unusual for legislators to occasionally defect in Canadian politics, the recent rate of party-switching was "extraordinary", said Semra Sevi, who teaches political science at the University of Toronto.

From BBC • Apr. 13, 2026

Masie Nchama, a computer science student who dreamed of moving abroad, left the central African nation for military training but found himself forcibly enrolled in the Russian army and headed for war.

From Barron's • Apr. 13, 2026

But Barry, the eldest Voight brother, had been more interested in science than celebrity.

From "Mountain of Fire" by Rebecca E. F. Barone

Related Words

• art
• discipline
• education
• information
• learning
• skill
• system
• technique