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1. Botany
a. A modified branch in the form of a sharp woody structure.
b. Any of various other sharp protuberances, such as a spine.
c. Any of various shrubs, trees, or woody plants bearing such sharp structures.
2. Any of various sharp protuberances on an animal.
3. One that causes sharp pain, irritation, or discomfort: He is a thorn in my side.
4. The runic letter þ, used in Old English, Middle English, and Old Norse manuscripts to represent both the voiceless sound (th) of Modern English thin and the voiced sound (th) of Modern English this, and in modern Icelandic orthography to represent the voiceless sound (th).

[Middle English, from Old English.]

thorn′less adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.thornless - lacking thorns
unarmed - (used of plants or animals) lacking barbs or stings or thorns


[ˈθɔːnlɪs] ADJsin espinas


adjohne Dornen
References in classic literature ?
A few aloe plants and some chance-sown pellitory grew on the tops of the square pillars of the gates, which all but concealed the stems of a couple of thornless acacias that raised their tufted spikes, like a pair of green powder-puffs, in the yard.
Soft Caress' is a new cultivar, with thornless and slender leaves giving a more oriental and delicate appearance.
The thornless honey locust casts a delicate shade through its tropical-looking fernlike foliage and rapidly grows to its mature height of 45 feet.
Along her path, guests presented her with long-stemmed thornless red roses.
Strik recommends: Trailing blackberries: New thornless Columbia Star and old favorites Marion and Boysen Erect, late-season thornless blackberries: Navaho Semi-erect, last-season blackberries: Triple Crown Summer-bearing red raspberries: new Cascade Delight and Chemainus Yellow raspberries: New Cascade Gold and older favorite Meeker Everbearing (also called primocane-fruiting) raspberries: Vintage is a new red; Anne is the best yellow Black raspberries: Jewel For more information about growing caneberries, check out these OSU Extension publications: "Growing Blackberries in Your Home Garden" "Growing Raspberries in Your Home Garden" "Blackberry Cultivars for Oregon" "Raspberry Cultivars for the Pacific Northwest" - Oregon State University Extension Service
The sprawling landscape included a half-acre pond stocked with fish and surrounded by willows and Louisiana irises, as well as a mature orchard filled with blueberry bushes, a dozen varieties of figs, and thornless blackberry bushes.
This thornless, trailing blackberry cultivar came from the same breeding program as Baby Blues and was also released in cooperation with the Oregon State University's Agricultural Experiment Station.
Once a rampant grower with vicious thorns, you can now buy more compact varieties and even a couple that are thornless.
Growers might consider planting Prime-Ark Freedom, a newer variety from University of Arkansas, which is thornless.
Mighty Mulberry 1/2 cup of mulberries (blackberries, raspberries as alternatives) 2 ripe pears or apples, chopped 1 1/2 cup almond milk 1/2 teaspoon vanilla extract Blackberries are great, but growing a mulberry tree that is thornless and does not take up a large footprint on your property seems like a better alternative.
5 hectares of the shores of Lake Issyk-Kul in the villages Grigorievka and Korumdu through the creation of public microreserves, greenhouses to grow thornless buckthorn, eco complex for its processing and implementation of eco-certification scheme
Turkey is not the gentle, thornless rose garden Erdoy-an wishes to have for himself, nor will it ever be.