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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

     1

   • A

     1

   • D

     2

   • I

     1

   • C

     3

   • A

     1

   • L

     1

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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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   Learn the origin, synonyms, examples, and usage of the word radical as an adjective and a noun. Find out how radical can mean a root, a principle, an extreme, a political activist, or a mathematical expression.

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

   dictionary.cambridge.org › dictionary › english

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   Learn the meaning of radical as an adjective, noun, and medical term. Find out how to use radical in sentences and phrases related to social, political, or economic change, or surgery.

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

   www.dictionary.com › browse › radical

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   noun. a person who holds or follows strong convictions or extreme principles; extremist. a person who advocates fundamental political, economic, and social reforms by direct and often uncompromising methods. Mathematics. a quantity expressed as a root of another quantity.

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

   www.thefreedictionary.com › radical

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   Radical can mean a root, a group of atoms, a slang term, or a political activist. Learn the different meanings and usage of radical in various contexts with examples and synonyms.

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

   dictionary.cambridge.org › dictionary › learner-english

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   Learn the meaning of radical as an adjective and a noun, and how to use it in different contexts. Find out the synonyms, antonyms, and translations of radical in other languages.

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

   www.collinsdictionary.com › dictionary › english

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   Learn the various meanings and uses of the word radical in English, from its origin as a root or base to its political and social implications. Find synonyms, pronunciation, examples, and related terms for radical.