- a sharp excrescence on a plant, especially a sharp-pointed aborted branch; spine; prickle.
- any of various thorny shrubs or trees, especially the hawthorns belonging to the genus Crataegus, of the rose family.
- the wood of any of these trees.
- a runic character (þ), borrowed into the Latin alphabet and representing the initial th sounds in thin and they in Old English, or thin in modern Icelandic.
- something that wounds, annoys, or causes discomfort.
- to prick with a thorn; vex.
- a source of continual irritation or suffering: That child is a thorn in the teacher's side.
- German name of Toruń.
- a sharp pointed woody extension of a stem or leaf
- any of various trees or shrubs having thorns, esp the hawthorn
- the wood of any of these plants
- short for thorn moth
- a Germanic character of runic origin Þ used in Old and Modern Icelandic to represent the voiceless dental fricative sound of th, as in thin, bath. Its use in phonetics for the same purpose is now obsolete
- this same character as used in Old and Middle English as an alternative to edh, but indistinguishable from it in function or sound
- any of various sharp spiny parts
- a source of irritation (esp in the phrases a thorn in one's side or flesh)
- the German name for Toruń
