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1. Dictionary

   rad·i·cal

   /ˈradək(ə)l/

   adjective

   • 1. (especially of change or action) relating to or affecting the fundamental nature of something; far-reaching or thorough: "a radical overhaul of the existing regulatory framework" Similar thoroughgoingthoroughcompletetotalentireabsoluteuttercomprehensiveexhaustiveroot-and-branchsweepingfar-reachingwide-rangingextensiveprofounddrasticsevereseriousmajordesperatestringentviolentforcefulrigorousdraconianOpposite superficial
   • ▪ forming an inherent or fundamental part of the nature of someone or something: "the assumption of radical differences between the mental attributes of literate and nonliterate peoples" Similar fundamentalbasicessentialquintessentialinherentinnatestructuraldeep-seatedintrinsicorganicconstitutiverootOpposite minor
   • ▪ (of surgery or medical treatment) thorough and intended to be completely curative.
   • 2. advocating or based on thorough or complete political or social change; representing or supporting an extreme or progressive section of a political party: "a radical activist" Similar revolutionaryprogressivereformingreformistprogressivistrevisionistleftistleft-wingsocialistanticapitalistextremistfanaticalmilitantdiehardinformal:wokeright-oninformal, derogatory:commieBolshevikleftyredpinkbolshieOpposite conservativereactionarymoderate
   • ▪ characterized by independence of or departure from tradition; innovative or unorthodox: "the daring, avant-garde spirit of the music was too radical for the conservative audience"
   • 3. denoting or relating to the roots of a word.
   • ▪ belonging to the root of a chord.
   • 4. of the root of a number or quantity.
   • 5. of, or springing direct from, the root or stem base of a plant.
   • 6. very good; excellent: informal North American "Okay, then. Seven o'clock. Radical!"

   noun

   • 1. a person who advocates thorough or complete political or social reform; a member of a political party or part of a party pursuing such aims.
   • 2. a group of atoms behaving as a unit in a number of compounds.
   • 3. the root or base form of a word.
   • ▪ any of the basic set of 214 Chinese characters constituting semantically or functionally significant elements in the composition of other characters and used as a means of classifying characters in dictionaries.
   • 4. a quantity forming or expressed as the root of another.
   • ▪ a radical sign.

   Word Origin late Middle English (in the senses ‘forming the root’ and ‘inherent’): from late Latin radicalis, from Latin radix, radic- ‘root’.

   Derivatives

   • 1. radicalness noun

   Scrabble Points: 10

   • R

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   • A

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   • D

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   • I

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   • C

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   • A

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   More definitions, origin and scrabble points

2. www.merriam-webster.com › dictionary › radicalRadical Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › radical

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   rad· i· cal ˈra-di-kəl. Synonyms of radical. 1. : of, relating to, or proceeding from a root: such as. a (1) : of or growing from the root of a plant. radical tubers. (2) : growing from the base of a stem, from a rootlike stem, or from a stem that does not rise above the ground.

3. dictionary.cambridge.org › dictionary › englishRADICAL | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

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   RADICAL definition: 1. believing or expressing the belief that there should be great or extreme social or political…. Learn more.

4. www.dictionary.com › browse › radicalRADICAL Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › radical

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   A group of atoms that behaves as a unit in chemical reactions and is often not stable except as part of a molecule. The hydroxyl, ethyl, and phenyl radicals are examples. Radicals are unchanged by chemical reactions.

5. www.vocabulary.com › dictionary › radicalRadical - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › radical

   noun. an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule. synonyms: free radical. see more.

6. www.thefreedictionary.com › radicalRadical - definition of radical by The Free Dictionary

   www.thefreedictionary.com › radical

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   1. Arising from or going to a root or source; basic: proposed a radical solution to the problem. 2. Departing markedly from the usual or customary; extreme or drastic: a radical change in diet. 3.

7. www.britannica.com › dictionary › radicalRadical Definition & Meaning | Britannica Dictionary

   www.britannica.com › dictionary › radical

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   a : very new and different from what is traditional or ordinary. The computer has introduced radical innovations. radical ideas about education. b : very basic and important. There are some radical differences between the two proposals. The new president has made some radical changes to the company. radical reforms. 2.

8. www.collinsdictionary.com › dictionary › englishRADICAL definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

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   radical, extreme, fanatical denote that which goes beyond moderation or even to excess in opinion, belief, action, etc. radical emphasizes the idea of going to the root of a matter, and this often seems immoderate in its thoroughness or completeness: radical ideas; radical changes or reforms. extreme applies to excessively biased ideas ...

9. dictionary.cambridge.org › dictionary › learner-englishRADICAL | meaning - Cambridge Learner's Dictionary

   dictionary.cambridge.org › dictionary › learner-english

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   RADICAL definition: 1. A radical change is very big and important: 2. believing that there should be big social and…. Learn more.

10. www.oxfordlearnersdictionaries.com › definition › englishradical adjective - Definition, pictures, pronunciation and usage...

    www.oxfordlearnersdictionaries.com › definition › english

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    radical. adjective. /ˈrædɪkl/ [usually before noun] relating to the most basic and important parts of something; complete and detailed synonym far-reaching. the need for radical changes in education. demands for radical reform of the law. radical differences between the two systems.

11. www.yourdictionary.com › radicalRadical Definition & Meaning | YourDictionary

    www.yourdictionary.com › radical

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    Radical definition: Arising from or going to a root or source; basic.