Definition of unrein in English:

unrein

verb

  • with object To free (a horse) from reins; (usually more generally) to release from restraint; to unleash.

Origin

Mid 16th century; earliest use found in William Painter (?1540–1594), translator and administrator. From un- + rein.

Pronunciation

unrein

/(ˌ)ʌnˈreɪn/