definition of
thorn

[1] #1 thorn n. [irritant] something that causes irritation and annoyance; "he's a thorn in my flesh". wn

[2] #2 thorn n. [spine, prickle, pricker, sticker, spikelet] a small sharp-pointed tip resembling a spike on a stem or leaf. wn

[3] #3 thorn n. a Germanic character of runic origin. wn