Singular second person prevocalic possessive determiner (preconsonantal form: thy). (determiner)
Singular second person possessive pronoun. (pronoun)
Examples of word thine
Before a noun beginning with a vowel thine and mine are commonly substituted for thy and my, as in thine eyes and mine infirmity.
Thou shalt not hate thy brother in thine heart: thou shalt in any wise rebuke [reason with] thy neighbour, and not suffer sin upon him.
Or how wilt thou say to thy brother, Let me pull out the mote out of thine eye; and, behold, a beam is in thine own eye?
For thine is the Himmler, the Goebbels and the Goering
And in thine old age will she still make thee glad, and thy memory of her in the days of thy strength will be sweet, for thou wilt know always that she was ease to thee, and peace, and rest, and that beyond all women to other men has she been woman to thee.
Be not wise in thine own eyes; fear the LORD, and depart from all evil.