olemus
liik kultuurispetsiifilisi sotsiaalseid norme

Wiktionary:
custom, noun
1. frequent repetition of the same behavior; way of behavior common to many; ordinary manner; habitual practice; method of doing, living or behaving
2. traditional beliefs or rituals
4. (law) long-established practice, considered as unwritten law, and resting for authority on long consent

näide
burial customs -- matusekombed

ülevaateid
https://en.wikipedia.org/wiki/Convention_(norm)

https://en.wikipedia.org/wiki/Social_norm

https://en.wikipedia.org/wiki/Customary_law

https://en.wikipedia.org/wiki/Tradition

https://en.wikipedia.org/wiki/Mores