thine /ðaɪn/determiner 1pronoun 1 determiner1 •(no longer used) Second-person singular prevocalic possessive determiner (preconsonantal form: thy).Thine alabaster cities gleam / Undimmed by human tears! — 1895 pronoun1 •(no longer used) Second-person singular possessive pronoun; yours.But if I finish all of my chores and you finish thine / Then tonight we're gonna party like it's 1699 — 1996
