Register
The variety of language used in a particular social context, determined by field, tenor, and mode. Register varies along formality and appropriateness dimensions.
Real World
Rihanna's Fenty Beauty uses casual, emoji-filled Instagram captions ('ur skin is everything') with customers but formal press releases for investors — the same brand shifts register depending on audience.
Exam Focus
Always link register to purpose and audience; stating language is 'formal' without explaining why scores few marks.
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