Register of Discourse

1)is a linguistic outcome of a particular social situation.
2)primarily variation in language use in non-literary situations (e.g. an interview, sports commentary, a telephone conversation, a political speech, legal language) and depends a lot upon the social background, geography, sex and age of the language user. [33: 155-156]
3)is the set of meanings, the configuration of semantic patterns, that are typically drawn upon under the specific conditions, along with the words and structures that are used in the realization of these meanings" (32, Halliday, 1978:23)

In general, the register of communication, or the speaker’s choice of sound, grammar and lexis, is determined by the subject matter of conversation (“field”), the medium of information exchange (“mode”), and social roles of participants (“tenor”). Different registers may overlap with each other in respect of mode or field. Thus, register essentially represents degree of formality, and is important for socio-pragmatic investigations of style. [33: 155-156]