1. Full of thorns or spines; rough with thorns; spiny; as, a thorny wood; a thorny tree; a thorny crown.
2. Like a thorn or thorns; hence, figuratively, troublesome; vexatious; harassing; perplexing. The thorny point of bare distress. The steep and thorny way to heaven.
(Science: botany) (Shak) Thorny rest-harrow, rest-harrow. Thorny trefoil, a prickly plant of the genus Fagonia (F. Cretica, etc).
Origin: Cf. AS. Thorniht.