Thine is defined as something belongs to you.
An example of thine is John telling Mary that the horse belongs to John, by saying the horse is thine.
that or those belonging to thee (you): the possessive form of thou, used without a following noun: this book is thine; thine are better; is he a friend of thine?
Origin of thineMiddle English thin ; from OE, genitive of thu, thou ( Middle English loss of -n before a consonant gives thy)
thy: used esp. before a word beginning with a vowel or the letter h
pron.(used with a sing. or pl. verb)
Used to indicate the one or ones belonging to thee.
adjectiveA possessive form of thou1.
Used instead of thy before an initial vowel or h: “The presidential candidates are practicing the first rule of warfare: know thine enemy” (Eleanor Clift).
Origin of thineMiddle English thin; see thy.
- (archaic) Singular second person prevocalic possessive determiner (preconsonantal form: thy).
- (archaic) Singular second person possessive pronoun.