Definition of ourn in English:

ourn

(also our'n)

pronoun

Southern, Midlands, South Midland, New England, English Regional, United States Regional
  • Ours.

Origin

Late Middle English; earliest use found in The Wycliffite Bible (early version). Alteration of our, after mine, thine. Compare hern, his'n, theirn, yourn.

Pronunciation

ourn

/ˈaʊən//ɑːn/