"one who lives near another," Middle English neighebor, from Old English neahgebur (West Saxon), nehebur (Anglian) "one who dwells nearby," from neah "near" (see nigh) + gebur "dweller," related to bur "dwelling," from Proto-Germanic *(ga)būraz (from PIE root *bheue- "to be, exist, grow"). A common Germanic compound (cognates: Old Saxon nabur, Middle Dutch naghebuur, Dutch (na)bur, Old High German nahgibur, Middle High German nachgebur, German Nachbar). Good neighbor policy is attested by 1937, but good neighbor with reference to U.S. policy toward Latin America was used by 1928 by Herbert Hoover.
"border on or be near to," 1580s, from neighbor (n.). Related: Neighbored; neighboring.