thornya.[Cf. AS. orniht.]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.(Shak.)The steep and thorny way to heaven. (Shak.)Thorny rest-harrow (Bot.), rest-harrow. -- Thorny trefoil, a prickly plant of the genus Fagonia (Fagonia Cretica, etc.).()