'Thine' definitions:

Definition of 'Thine'

From: GCIDE
  • Thine \Thine\ ([th][imac]n), pron. & a. [OE. thin, AS. [eth][imac]n, originally gen. of [eth]u, [eth][=u], thou; akin to G. dein thine, Icel. [thorn]inn, possessive pron., [thorn][imac]n, gen. of [thorn][=u] thou, Goth. [thorn]eins, possessive pron., [thorn]eina, gen. of [thorn]u thou. See Thou, and cf. Thy.] A form of the possessive case of the pronoun thou, now superseded in common discourse by your, the possessive of you, but maintaining a place in solemn discourse, in poetry, and in the usual language of the Friends, or Quakers. [1913 Webster]
  • Note: In the old style, thine was commonly shortened to thi (thy) when used attributively before words beginning with a consonant; now, thy is used also before vowels. Thine is often used absolutely, the thing possessed being understood. [1913 Webster] [1913 Webster]

Definition of 'Thine'

From: GCIDE
  • thou \thou\ ([th]ou), pron. [Sing.: nom. Thou; poss. Thy ([th][imac]) or Thine ([th][imac]n); obj. Thee ([th][=e]). Pl.: nom. You (y[=oo]); poss. Your (y[=oo]r) or Yours (y[=oo]rz); obj. You.] [OE. thou, [thorn]u, AS. [eth][=u], [eth]u; akin to OS. & OFries. thu, G., Dan. & Sw. du, Icel. [thorn][=u], Goth. [thorn]u, Russ. tui, Ir. & Gael. tu, W. ti, L. tu, Gr. sy`, Dor. ty`, Skr. tvam. [root]185. Cf. Thee, Thine, Te Deum.] The second personal pronoun, in the singular number, denoting the person addressed; thyself; the pronoun which is used in addressing persons in the solemn or poetical style. [1913 Webster]
  • Art thou he that should come? --Matt. xi. 3. [1913 Webster]
  • Note: "In Old English, generally, thou is the language of a lord to a servant, of an equal to an equal, and expresses also companionship, love, permission, defiance, scorn, threatening: whilst ye is the language of a servant to a lord, and of compliment, and further expresses honor, submission, or entreaty." --Skeat. [1913 Webster]
  • Note: Thou is now sometimes used by the Friends, or Quakers, in familiar discourse, though most of them corruptly say thee instead of thou. [1913 Webster]