neighborhood UK /ˈneɪbə.hʊd/US /ˈneɪbɚˌhʊd/noun 15forms 1 noun15 •the area around someone's home, with its streets and housesHe lives in my neighborhood. •The inhabitants of a residential area.The fire alarmed the neighborhood. •A formal or informal division of a municipality or region.We have just moved to a pleasant neighborhood. •An approximate amount.He must be making in the neighborhood of $200,000 per year. •The quality of physical proximity.The slums and the palace were in awful neighborhood. •(old-fashioned) Close proximity; nearness.At first he was partly hidden among the latschen, then his hind-quarters, quite black, emerged from the dark green bushes, as he slowly moved on, perfectly unconscious of our neighbourhood. — 1853 •A set containing an open set which contains some specified point. •Alternatively: An open set which contains some specified point. •A set containing an open ball which contains a specified point. •Alternatively: An open ball which contains some specified point. •The set of all the vertices adjacent to a given vertex. •The set of all cells near a given cell used to determine that cell's state in the next generation.In fact, it looks at the number of states and the neighborhood of the rule (determined by the filename), and decides whether to make it a lookup-table, or a "computed-function" rule. — 1990 •The infinitesimal open set of all points that may be reached directly from a given point. •(no longer used) The quality of being a neighbor, of living nearby, next to each other; proximity.Our neighborhood was our only reason to exchange hollow greetings. •(no longer used) The disposition becoming a neighbor; neighborly kindness or good will. formsneighborhoods