Webster's Revised Unabridged Dictionary · 1913

Adown

Adown ({not transcribed}) , adverb

[Old English adun, adoun, adune. Anglo-Saxon of dūne off the hill. See Down.]

From a higher to a lower situation; downward; down, to or on the ground. [Archaic]
Thrice did she sink adown. — Spenser

Adown , preposition

Down. [Archaic & Poetic]
Her hair adown her shoulders loosely lay displayed. — Prior