Sentence:  The identification of the basic unit of religious organization - the parish or congregation - with a residential <WSD>area</WSD> is self defeating in a modern metropolis , for it simply means the closing of an iron trap on the outreach of the Christian fellowship and the transmutation of mission to co-optation . 
Meaning of the word marked with <WSD> tags:  a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)