'Theirs' definitions:

Definition of 'Theirs'

From: GCIDE
  • He \He\ (h[=e]), pron. [nom. He; poss. His (h[i^]z); obj. Him (h[i^]m); pl. nom. They ([th][=a]); poss. Their or Theirs ([th][^a]rz or [th][=a]rz); obj. Them ([th][e^]m).] [AS. h[=e], masc., he['o], fem., hit, neut.; pl. h[imac], or hie, hig; akin to OFries. hi, D. hij, OS. he, hi, G. heute to-day, Goth. himma, dat. masc., this, hina, accus. masc., and hita, accus. neut., and prob. to L. his this. [root]183. Cf. It.]
  • 1. The man or male being (or object personified to which the masculine gender is assigned), previously designated; a pronoun of the masculine gender, usually referring to a specified subject already indicated. [1913 Webster]
  • Thy desire shall be to thy husband, and he shall rule over thee. --Gen. iii. 16. [1913 Webster]
  • Thou shalt fear the Lord thy God; him shalt thou serve. --Deut. x. 20. [1913 Webster]
  • 2. Any one; the man or person; -- used indefinitely, and usually followed by a relative pronoun. [1913 Webster]
  • He that walketh with wise men shall be wise. --Prov. xiii. 20. [1913 Webster]
  • 3. Man; a male; any male person; -- in this sense used substantively. --Chaucer. [1913 Webster]
  • I stand to answer thee, Or any he, the proudest of thy sort. --Shak. [1913 Webster]
  • Note: When a collective noun or a class is referred to, he is of common gender. In early English, he referred to a feminine or neuter noun, or to one in the plural, as well as to noun in the masculine singular. In composition, he denotes a male animal; as, a he-goat. [1913 Webster]

Definition of 'Theirs'

From: GCIDE
  • She \She\, pron. [sing. nom. She; poss. Her. or Hers; obj. Her; pl. nom. They; poss. Theiror Theirs; obj. Them.] [OE. she, sche, scheo, scho, AS. se['o], fem. of the definite article, originally a demonstrative pronoun; cf. OS. siu, D. zij, G. sie, OHG. siu, s[imac], si, Icel. s[=u], sj[=a], Goth. si she, s[=o], fem. article, Russ. siia, fem., this, Gr. ?, fem. article, Skr. s[=a], sy[=a]. The possessive her or hers, and the objective her, are from a different root. See Her.]
  • 1. This or that female; the woman understood or referred to; the animal of the female sex, or object personified as feminine, which was spoken of. [1913 Webster]
  • She loved her children best in every wise. --Chaucer. [1913 Webster]
  • Then Sarah denied, . . . for she was afraid. --Gen. xviii. 15. [1913 Webster]
  • 2. A woman; a female; -- used substantively. [R.] [1913 Webster]
  • Lady, you are the cruelest she alive. --Shak. [1913 Webster]
  • Note: She is used in composition with nouns of common gender, for female, to denote an animal of the female sex; as, a she-bear; a she-cat. [1913 Webster]