Sentence:  Where boundary maintenance describes the boundaries or limits of the group , systemic linkage is <WSD>defined</WSD> `` as the process whereby one or more of the elements of at least two social systems is articulated in such a manner that the two systems in some ways and on some occasions may be viewed as a single unit . 
Meaning of the word marked with <WSD> tags:  give a definition for the meaning of a word