It's the process by which messages or information is sent from one place or person to another, or the message itself.

It's the process of using language to learn whilst learning to use language effectively.

It's the process of teaching English to students with different first-languages.

It's the way of life, especially the general customs and beliefs, of a particular group of people at a particular time.

It's the art of describing, showing, or performing that represent literature, art, music, dance, theater, etc

It's the exposure to alternative perspectives and shared understandings, which deepen awareness of otherness and self.

It's the development of thinking skills which link concept formation (abstract and concrete), understanding and language.

It's the use of conscious mental processes.

It's the mental action or process of acquiring knowledge and understanding through thought, experience, and the senses.

Subject matter is not only about acquiring knowledge and skills,

it is about the learner constructing his/her own knowledge and

developing skills (Lantolf, 2000; Vygotsky, 1978)

Interaction in the learning context is fundamental to learning.

This has implications when the learning context operates through L2 (Pica, 1991; van Lier, 1996)

Language needs to be learned in context, learning through the language, reconstructing the subject themes and their related cognitive processes e.g. language intake/output (Krashen,1985; Swain, 2000)

This sort of instruction can take place in any country, English-speaking or not. Typically, it is learned either to pass exams as a necessary part of one's education, or for career progression while one works for an organization or business with an international focus.