thorn

noun

ˈthȯrn 

often attributive

1

a

: a sharp rigid process on a plant

especially : one that is a short, indurated, sharp-pointed, and leafless modified stem compare prickle, spine

b

: any of various sharp spinose structures on an animal

2

: a woody plant bearing sharp impeding processes (such as prickles or spines)

especially : hawthorn

3

: something that causes distress or irritation

—often used in the phrase thorn in one's side

4

: the runic letter þ used in Old English and Middle English to represent either of the fricatives \th\ or \t͟h\ and in Icelandic to represent \th\

thorned

ˈthȯrnd 

adjective

thornless

ˈthȯrn-ləs 

adjective

thornlike

ˈthȯrn-ˌlīk 

adjective

Synonyms

• aggravation
• aggro [British]
• annoyance
• bother
• botheration
• bugbear
• exasperation
• frustration
• hair shirt
• hassle
• headache
• inconvenience
• irk
• irritant
• nuisance
• peeve
• pest
• rub
• ruffle
• trial
• vexation

Examples of thorn in a Sentence

your constant questions are a thorn in my side

Recent Examples on the Web

The defense was a disruptive force throughout too – coming up with three turnovers – with defensive end Trey Hendrickson particularly proving to be a thorn in Mahomes’ side. —Ben Morse, CNN, 16 Sep. 2024

Local zoning restrictions have increasingly been a thorn in its side. —Tribune News Service, The Mercury News, 14 Aug. 2024

Time:Space is the gigantic 84 year old and 5 year old combination; two bottles sitting one inside the other and housed in an enormous red display/pouring container coated in 200 thorns. —Mark Littler, Forbes, 3 Sep. 2024

Irish was not part of the new study but was the senior author of a 2020 study that found thorns grow on plants through the activity of stem cells. —Taylor Nicioli, CNN, 1 Aug. 2024

Word History

Etymology

Middle English, from Old English; akin to Old High German dorn thorn, Sanskrit tṛṇa grass, blade of grass

First Known Use

before the 12th century, in the meaning defined at sense 2

Phrases Containing thorn

• a thorn in the/someone's flesh/side
• Christ's-thorn
• Christ-thorn
• Jerusalem thorn
• thorn apple

Kids Definition

thorn

noun

ˈthȯ(ə)rn 

1

: a woody plant bearing sharp processes (as prickles or spines)

especially : hawthorn

2

: a sharp stiff process on a plant

especially : a stem modified into a short, stiff, and leafless sharp point

3

: something or someone that causes distress or irritation

—often used in the phrase thorn in one's side

thorned

ˈthȯ(ə)rnd 

adjective

thornless

ˈthȯ(ə)rn-ləs 

adjective