What is Typesetting?

Legal Definition
Typesetting is the composition of text by means of arranging physical types or the digital equivalents. Stored letters and other symbols (called sorts in mechanical systems and glyphs in digital systems) are retrieved and ordered according to a language's orthography for visual display. Typesetting requires the prior process of designing a font (which is widely but erroneously confused with and substituted for typeface). One significant effect of typesetting was that authorship of works could be spotted more easily, making it difficult for copiers who have not gained permission.
-- Wikipedia
Legal Definition
Composing of a text or display of reading matter into a computer or a physical type for the intended audience, reproduction method and use.