In linguistics, a register refers to a variety of a language used for a particular purpose or in a particular social setting. Each register is distinguished by its specific vocabulary, grammar, and style that are appropriate for that context. For example, the language used in a formal academic paper differs from the language used in casual conversation.

Register in linguistics has three different meanings can you be more specific?

In the narrow sense, linguistics refers specifically to the scientific study of language structure and usage. In the broad sense, linguistics encompasses the study of language in all its aspects, including historical evolution, cultural context, and social implications.

Linguistics is the scientific study of languages and includes many theories to include other branches and disciplines of study such as Psychology, sociology, Anthropology,history,cognitive science etc.) is used to explain a language theory and it can be referred to as applied linguistics.

Fields of study in applied linguistics include socio linguistics,phonetics,historical linguistics,syntax,semantics,stylistics,cognitive linguistics and not limited to, second language acquisition, language testing, language program evaluation, forensic linguistics,& discourse analysis .

Pure linguistics is more theoretical, and applied linguistics is more practical and the testing of the theories.

applied linguistics is the application of linguistics theories and findings in order to solve the language related problems while, descriptive linguistics is the field of linguistics that is concern with the description of two languages applied linguistics is the application of linguistics theories and findings in order to solve the language related problems while, descriptive linguistics is the field of linguistics that is concern with the description of two languages