Science (from the Latin scientia, meaning "knowledge") is, in its broadest sense, any systematic knowledge-base or prescriptive practice that is capable of resulting in a correct prediction, or reliably-predictable type of outcome. In this sense, science may refer to a highly skilled technique, technology, or practice, from which a good deal of randomness in outcome has been removed.
In its more restricted contemporary sense, science refers to a system of acquiring knowledge based on scientific method, and to the organized body of knowledge gained through such research. Science is sometimes called experimental science to differentiate it from applied science, which is the application of scientific research to specific human needs—although the two are commonly interconnected.
Science is a continuing effort to discover and increase human knowledge and understanding through disciplined research. Using controlled methods, scientists collect observable evidence of natural or social phenomena, record measurable data relating to the observations, and analyze this information to construct theoretical explanations of how things work. The methods of scientific research include the generation of hypotheses about how phenomena work, and experimentation that tests these hypotheses under controlled conditions. Scientists are also expected to publish their information so other scientists can do similar experiments to double-check their conclusions. The results of this process enable better understanding of past events, and better ability to predict future events of the same kind as those that have been tested.
The ability of the general population to understand the basic concepts related to science is referred to as scientific literacy.
- Online dictionary. Merriam-Webster. Retrieved on 2009-05-22. “a department of systematized knowledge as an object of study<the science of theology> . . . something (as a sport or technique) that may be studied or learned like systematized knowledge <have it down to a science> . . . a system or method reconciling practical ends with scientific laws <cooking is both a science and an art>”
- Online dictionary. Merriam-Webster. Retrieved on 2009-05-22. “knowledge or a system of knowledge covering general truths or the operation of general laws especially as obtained and tested through scientific method . . . such knowledge or such a system of knowledge concerned with the physical world and its phenomena”
- Popper, Karl  (2002). The Logic of Scientific Discovery, 2nd English, New York, NY: Routledge Classics, 3. ISBN 0-415-27844-9. OCLC 59377149.