In the linguistic pragmatics, there are terminological relation to text, discourse, conversation and dialog. Therefore, linguists who intend to study on text linguistics and dialog(discourse or conversation) analysis are very confused. ``Text`` means traditionally an entity of written and monolog language. However, many linguists think ``text`` can involve oral and bidirectional communication, too. The situation of ``text`` is similar to ``discourse``. ``Discourse`` is text for someone but conversation for another. It can be dialog and text for the others. The terms such as conversation, discourse and dialog used in the conversation(discourse) analysis are also very confusing. The purpose of this article is to clarify how the terms are used and can be understood in the linguistics. Additionally it will define the clear relation between text and dialog, especially, the dialogic features in the text.