Merriam-Webster's Collegiate® Dictionary, 11th Edition
NEIGHBOR
I. noun see: nigh Date: before 12th century one living or located near another, fellow man ,
II. adjective
Date: 1530
being immediately adjoining or relatively near,
III. verb (neighbored; neighboring)
Date: circa 1586
transitive verb to adjoin immediately or lie relatively near to, intransitive verb to live or be located as a neighbor, to associate in a neighborly way