Meaning of NORM in English

norm AC /nɔːm $ nɔːrm/ BrE AmE noun [countable]

[ Date: 1800-1900 ; Language: Latin ; Origin: norma 'tool for checking straight lines and angles' ]

1 . the usual or normal situation, way of doing something etc

be/become the norm

Short term contracts are now the norm with some big companies.

Joyce’s style of writing was a striking departure from the literary norm.

2 . norms [plural] generally accepted standards of social behaviour:

terrorists who violate the norms of civilized society

social/cultural etc norms

3 . the norm the normal or average standard

above/below the norm

28% of children tested below the norm.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.