Register often refers to the degree of formality of language, but in a more general sense it means the language used by a group of people who share similar work or interests, such as doctors or lawyers.

Example
For formal and informal register; 'Would you mind passing the salt?' is appropriate for a formal situation with strangers, whereas 'Pass me the salt' would be used for a situation where friends are talking, or possibly when being rude.

In the classroom
Although register is a complex area, the most common aspect looked at in language learning is the degree of formality. Teachers often divide functional language into three working categories, formal, neutral and informal.

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