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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.