ppl. a. Obs. [f. COPARTN-ER. + -ING, as if there were a verb coparten.] Being or acting as co-partners; associated in any business or transaction.
1645. Pagitt, Heresiogr. (1646), 128. They teach, that grace and free-will are co-partning causes joyntly concurring to the beginning of conversion.
1648. Milton, Observ. Art. Peace, Wks. 1738, I. 353. The Sympathy and joint pace which they go in the North of Ireland, with their Copartning Rebels in the South.