I still haven’t met my next-door neighbor (=neighbor who lives next to me).
1 someone who lives in the house or apartment next to you or near you: The neighbors invited us over for dinner. neighbor kids I still haven’t met my next-door neighbor (=neighbor who lives next to me).2a country’s neighbors are the countries that share a border with it: the U.S. and its neighbor to the south, Mexico3someone who is standing or sitting next to you: Don’t look at your neighbor’s work during the test. [Origin: Old English neahgebur]