UBS Dictionary of the Greek New Testament

Sense 1: neighbor, brother

Semantic entry: 11.89

Semantic domains: Groups and Classes of Persons and Members of Such Groups and Classes

Subdomains: Socio-Political

Definition: a person who lives close beside others and who thus by implication is a part of a so-called in-group, that is, the group with which an individual identifies both ethnically and culturally

Notes: It may be that of the three terms γείτων, περίοικος, and πλησίον[b], the last is somewhat broader in meaning. At least πλησίον is used in RV LUK 10:27 · LV LUK 10:27 · Read together LUK 10:27 in a somewhat extended sense of ‘fellow man,’ while ἀδελφός[e] probably suggests a more intimate or close relationship.