Meaning and usage of the word introductory in English

The word "introductory" derived from the Latin prefix "intro-," meaning "into," and the verb "duco," meaning "lead" or "introduce." The term first appeared in the English language in the 17th century and was initially used in a literary context to describe the opening sections of a book or article. In its earliest use, the term "introductory" was applied to preliminary chapters or sections that provided background information or orientation to the reader. Over time, the meaning of the word has expanded to include any item or event that serves as an initial or preparatory stage, such as introductory meetings, classes, or products. In essence, "introductory" refers to anything that lays the groundwork for the subsequent development or unfolding of something else.