"Science" is a word of Latin origin and is translated from this language as "knowledge". There was a time when this concept did not exist, the term "philosophy" was used instead. That is, the term "philosophy" denoted all the knowledge acquired by mankind (more about the term philosophy on the 123helpme website at the link https://123helpme.org/).
Science is a system of concepts about reality and is aimed at research based on certain methods of learning the objective laws of the development of nature, society and thinking, predicting and transforming reality in the interests of society and man.
Each science must meet the system of requirements: have a clearly defined subject, open patterns within its boundaries, a developed categorical apparatus, specific research methods, a formed theory, a field of practical application, be relevant and institutionalized in certain scientific, social and state circles, organizations, institutions.