brother, companion, fellow, friend, husband, lover, neighbour, X (an-)other
Concise Bible Dictionary:
Besides the ordinary use of the word in its literal sense, it is applied to cousins and nephews (Gen. 14:14; Lev. 10:4); and to kinsmen generally (Ex. 2:11; 2 Kings 10:13; 2 Chron. 22:8). Also employed where there is a moral likeness (Job 30:29; Prov. 18:9). See BRETHREN.
Strong’s Dictionary of Hebrew Words:
Meaning:
or reya2 {ray'-ah}; from 7462; an associate (more or less close)
KJV Usage:
brother, companion, fellow, friend, husband, lover, neighbour, X (an-)other
From Manners and Customs of the Bible:
Luke 10:29. He, willing to Justify himself, said unto Jesus, And who is my neighbor?
The Jews gave a very narrow definition of the word “neighbor.” The robbing interpreted it to mean only those who were of the Jewish people. The Gentiles were not considered neighbors.