(botany) A sharp protective spine of a plant. / Any shrub or small tree that bears thorns, especially a hawthorn. / (figuratively) That which pricks or annoys; anything troublesome.

To pierce with, or as if with, a thorn (sharp pointed object).

A topographic surname from Middle English for someone living near a thorn bush. / A hamlet in Houghton Regis parish, Central Bedfordshire, Bedfordshire, England (OS grid ref TL0024).

simple past tense and past participle of thorn

containing thorns

An English surname from Middle English, variant of Thorn. / An unincorporated community in Ontario, Canada. / A municipality of Quebec, Canada. / Two hamlets in Cornwall, England.

Third-person singular simple present indicative form of thorn

plural of thorn

present participle of thorn

(idiomatic) A persistent difficulty or something very annoying that will not go away.