\Thy\, pron. [OE. thi, shortened from thin. See {Thine},
{Thou}.]
Of thee, or belonging to thee; the more common form of thine,
possessive case of thou; -- used always attributively, and
chiefly in the solemn or grave style, and in poetry. Thine is
used in the predicate; as, the knife is thine. See {Thine}.

      Our father which art in heaven, Hallowed be thy name.
      Thy kingdom come. Thy will be done.      --Matt. vi.
                                               9,10.

      These are thy glorious works, Parent of good. --Milton.