- 1a small, sharp, pointed part on the stem of some plants, such as roses
- 2a tree or bush that has thorns see blackthorn, hawthorn
- 3(phonetics) the letter that was used in Old English and Icelandic to represent the sounds/θ/ and/ð/ and later written as th Idioms
a person or thing that repeatedly annoys someone or stops them from doing something
Check pronunciation: thorn