What does adjacent mean?
The definition of adjacent
Ad*ja”cent, a.
Etym: [L. adjacens, -centis, p. pr. of adjacere to lie near; ad + jac to lie: cf. F. adjacent.]

Lying near, close, or contiguous; neighboring; bordering on; as, a field adjacent to the highway. “The adjacent forest.” B. Jonson. Adjacent or contiguous angle. (Geom.) See Angle.

Synonyms
— Adjoining; contiguous; near.
— Adjacent, Adjoining, Contiguous. Things are adjacent when they lie close each other, not necessary in actual contact; as, adjacent fields, adjacent villages, etc. I find that all Europe with her adjacent isles is peopled with Christians. Howell. Things are adjoining when they meet at some line or point of junction; as, adjoining farms, an adjoining highway. What is spoken of as contiguous should touch with some extent of one side or the whole of it; as, a row of contiguous buildings; a wood contiguous to a plain.

Ad*ja”cent, n.
That which is adjacent. [R.] Locke.