Real Dictionary

holism
uncountable noun: Holism is the belief that everything in nature is connected in some way.

holism in American English
the view that an organic or integrated whole has an independent reality which cannot be understood simply through an understanding of its parts
noun: the theory that whole entities, as fundamental components of reality, have an existence other than as the mere sum of their parts

holism in British English
noun: any doctrine that a system may have properties over and above those of its parts and their organization