thine

UK: /ðaɪn/ US: /ðaɪn/ ,(ᵺīn)

WordReference Random House Learner's Dictionary of American English © 2026

thine /ðaɪn/   pron. 

1. (used after the verb be or sometimes after a noun) the form of the pronoun thou that is used to show possession:
   It is thine; the glory thine.
2. the form of the pronoun thou used before a noun beginning with a vowel or vowel sound:
   thine honor.
   Compare thy.
3. that which belongs to thee:
   Thine is the kingdom, the power, and the glory.

WordReference Random House Unabridged Dictionary of American English © 2026

thine (ᵺīn),  pron. 

1. the possessive case of thou used as a predicate adjective, after a noun or without a noun.
2. the possessive case of thou used as an attributive adjective before a noun beginning with a vowel or vowel sound:
   thine eyes; thine honor.
   Cf. thy. 
3. that which belongs to thee:
   Thine is the power and the glory.

• bef. 900; Middle English, Old English thīn; cognate with Old Norse thinn, Gothic theins; see thou

Collins Concise English Dictionary © HarperCollins Publishers::

thine / ðaɪn/ determiner

1. (preceding a vowel) of, belonging to, or associated in some way with you (thou): thine eyes
2. (as pronoun): thine is the greatest burden

Compare thy

Etymology: Old English thīn; related to Old High German dīn, Gothic theina