Bible Dictionaries
Thy

Webster's Dictionary

(pron.) 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.

Bibliography Information
Webster, Noah. Entry for 'Thy'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/thy.html. 1828.