SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING In fact. a description can often serve as a definition b y enlightening us about a thing, it enlightens us about the use of the term that refers to the thing. For example, we find later in this chapter a description of the mechanism used to lift liquids and when we have finished reading that, we know how to define the term jet pump. But for the moment, we are not concerned with description as a form of definition, nor concerned with certain other kinds of definition(for instance, what is known as recursive definition in arithmetic and grammar). We, instead, are concerned with traditional, or classic, definition, which goes back as far as Aristotle.Our discussion is confined to that formSCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING In fact, a description can often serve as a definition: by enlightening us about a thing, it enlightens us about the use of the term that refers to the thing. For example, we find later in this chapter a description of the mechanism used to lift liquids, and when we have finished reading that, we know how to define the term jet pump. But for the moment, we are not concerned with description as a form of definition, nor concerned with certain other kinds of definition (for instance, what is known as recursive definition in arithmetic and grammar). We, instead, are concerned with traditional, or classic, definition, which goes back as far as Aristotle. Our discussion is confined to that form