To be almost like some other thing; to verge on.
To share a border with.
To be similar to, to be almost the same as.
To associate intimately with; to be close to.
To be adjacent to
A person living on adjacent or nearby land; a person situated adjacently or nearby; anything (of the same type of thing as the subject) in an adjacent or nearby position.
One who is near in sympathy or confidence.
A fellow human being.