Bourn

Bourn

n.
  1. A stream or rivulet; a burn.
    My little boat can safely pass this perilous bourn.

Bourn

n.
  1. A bound; a boundary; a limit. Hence: Point aimed at; goal.
    Where the land slopes to its watery bourn.
    The undiscovered country, from whose bourn No traveler returns.
    Sole bourn, sole wish, sole object of my song.
    To make the doctrine . . . their intellectual bourne.