Corporate security presents a modern business function of protecting persons, property and business within the organizational structure of large business systems. By carrying out its core business, in the context of protecting corporate interests and defined goals, the corporate security also contributes to significantly wider frameworks. Through the promotion of responsible corporate behavior in the area of security in its environment and the social community in which it operates, it has a positive impact on the increase of the overall level of national security. Since the modern corporate environment is rapidly changing due to numerous complex factors, risks and threats to business entities increasingly show a huge variety as well as a very frequent change of forms and manifestations. That is why under the scope of corporate security there is a large number of protective functions, among which the most important are information security, private security, technical protection, fire protection, occupational safety and protection of business secrets and intellectual property. Since the corporate security can not exist independently, it needs a suitable functional framework. This paper will address problems arising from the concept of corporate security, with a specific focus on terminology and creation of a glossary of security terms, using as the base a scope of regulations on information security, occupational safety, privacy, intellectual property protection, business secrets and protection at work. Based on the analysis of professional literature and definitions given in its components, the concept of corporate security will be considered as a fundamental concept within the security area, whose consistency and clarity are important for the stability of a business entity.