Webster's Revised Unabridged Dictionary · 1913

Bourn

Bourn ({not transcribed}) , noun

[Old English burne, borne, Anglo-Saxon burna; akin to Old Saxon brunno spring, German born, brunnen, Old High German prunno, Gothic brunna, Icelandic brunnr, and perh. to Greek {not transcribed}. The root is prob. that of burn, v., because the source of a stream seems to issue forth bubbling and boiling from the earth. Compare Torrent, and see Burn, v.]

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

Also: Bourne

Bourn ({not transcribed}) , noun

[French borne. See Bound a limit.]

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

Also: Bourne