(n)region, partthe extended spatial location of something“the farming regions of France”, “religions in all parts of the world”, “regions of outer space”
(n)region, neighborhoodthe approximate amount of something (usually used prepositionally as in `in the region of')“it was going to take in the region of two or three months to finish the job”, “the price is in the neighborhood of $100”
(n)region, realma knowledge domain that you are interested in or are communicating about“it was a limited realm of discourse”, “here we enter the region of opinion”, “the realm of the occult”