What are the definitions that best describe the culture?
Think culture is a way of life for different races / ethnicity encompasses many facets like religions, languages, dressing attires, hair styles, types of cuisine / food eaten, certain games / sports / martial arts practiced, certain musical instruments played, certain songs / musics / dances, value systems etc. which have their own unique identity.
I think that a social constructivist orientation to culture may work best for you. It is such a quixotic concept....and one that we can't get a great handle on. I think it was Michael Agar that quoted a tongue-in-cheek joke about culture ..."how can you tell cultural anthropologists at a convention of social scientists?....They are the ones that never try to talk about culture"....I think that Misra and Gergen's paper from the 1990s on culture and its role in Psychological science would be a good beginning.....it is steeped in constructivist ideas (see attached)...I really do like the work of Agar in this regard too. He is very pragmatic about the concept of culture. His book, Language Shock" is a basic but fine starting point. I know these are less sociological and more psychological and anthropological...but I think the Misra and Gergen paper has much to recommend.
Hmmm. can't seem to attach the article...Misra & Gergen, (1993) On the place of culture in psychological science. International journal of Psychology, 28, 225-243.