Neighborly, a.
Etymology: [Also written neighbourly.]
Apropriate to the relation of neighbors; having frequent or familiar intercourse; kind; civil; social; friendly. -- adv.
In a neigborly manner. Judge if this be neighborly dealing. Arbuthnot.
Shades of meaning
Fernald has no entry of its own for neighborly; he lists it under friendly.
Where he writes about it:
We speak of a cordial greeting, a favorable reception, a neighborly call, a sociable visitor, an amicable settlement, a kind interest, a friendly regard, a hearty welcome. — from friendly