Citations:that

Conjunction: "so, so that"

 * 1810, Thomas Williams, Sermons on Important Subjects, page 28:
 * to enquire what was necessary to be done, that sinners might be saved
 * ,, Christmas in 1875:
 * The life-blood of the slain / Poured out where thousands die that one may reign.

Conjunction: "seeing as, inasmuch as, given that"

 * 1849,, In Memoriam A.H.H.:
 * Are God and Nature then at strife, / That Nature lends such evil dreams?

Pronoun: demonstrative pronoun, "the thing, quality, etc indicated or understood"

 * 2003, Jo-Ann Mapson, Along Came Mary: A Bad Girl Creek Novel ISBN 0743238788, page 161:
 * That’s lesbians for you[:] practical, no frills.

Unclear

 * 1817, Trial of Andrew McKinley for administering unlawful oaths, A. D. 1817, reported by Thomas Jones Howell in A Complete Collection of State Trials and Proceedings (1826), volume XXXIII, page 606:
 * Was Simpson there? — Never that I saw.