D defs.my
Entry 1 sense Webster, 1913

Thy

/thī/ · IPA /ðaɪ/
01 pron. Of thee, or belonging to thee; the more common form of thine, possessive case of thou; -- used always attributively, and chiefly in the sol…
  1. 1.
    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. 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.