Webster's Revised Unabridged Dictionary · 1913

Adjoin

Adjoin ({not transcribed}) , transitive verb

[Old English ajoinen, Old French ajoindre, French adjoindre, from Latin adjungere; ad + jungere to join. See Join, and compare Adjunct.]

To join or unite to; to lie contiguous to; to be in contact with; to attach; to append.
Corrections... should be, as remarks, adjoined by way of note. — Watts

Adjoin (ad*join") , intransitive verb

1.
To lie or be next, or in contact; to be contiguous; as, the houses adjoin.
When one man's land adjoins to another's. — Blackstone

The construction with to, on, or with is obsolete or obsolescent.

2.
To join one's self. [Obsolete]
She lightly unto him adjoined side to side. — Spenser