[thy] adj [ME thin, thy, fr. OE thin, gen. of thu thou--more at thou] (12c) archaic: of or relating to thee or thyself esp. as possessor or agent or as object of an action--used esp. in ecclesiastical or literary language and sometimes by Friends esp. among themselves
THY
Meaning of THY in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012