- thine⇄adj. (Possessive form of) thou. thy; your (used only before a word beginning with a vowel or ?h, or after a noun).
Ex. thine enemies. - thine⇄thine, pronoun, adjective.
(Archaic.)
pron. (Possessive case of) thou. the one or ones belonging to thee; yours.
Ex. My heart is thine.