noun
Linguistics term for a variety of language used in a particular social setting or for a specific purpose. Often discussed in contrast with 方言 (dialect).
See also: 言語使用域
言語学では、場面に応じた言葉遣いの違いを使用域と呼ぶ。
In linguistics, differences in language use according to the situation are called register.
この論文は日本語の使用域について分析している。
This paper analyzes the registers of Japanese.
Dialect, which varies by region or social group, while 使用域 varies by situation or context.
Compound of 使用 (use) and 域 (area, domain). A modern technical term in linguistics, likely a calque from English 'register'.