English dictionary

radical meaning and definition

Definition and meaning of radical at MeaningMonkey.org. radical meaning and definition in the English Dictionary.


Definition of radical (noun)

  1. (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
  2. 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
    • "in the body free radicals are high-energy particles that ricochet wildly and damage cells"
    • synonyms: free radical
  3. a person who has radical ideas or opinions
  4. (mathematics) a quantity expressed as the root of another quantity
  5. a character conveying the lexical meaning of a logogram
  6. (linguistics) the form of a word after all affixes are removed

RADICAL adjective

Definition of radical (adjective)

  1. (used of opinions and actions) far beyond the norm
    • "extremist political views"; "radical opinions on education"; "an ultra conservative"
    • synonyms: extremist, ultra
  2. markedly new or introducing radical change
    • "a revolutionary discovery"; "radical political views"
    • synonyms: revolutionary
  3. arising from or going to the root or source
    • "a radical flaw in the plan"
  4. of or relating to or constituting a linguistic root
    • "a radical verb form"
  5. especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem
    • "basal placentation"; "radical leaves"
    • synonyms: basal
    • antonym: cauline
Source: Princeton University Wordnet

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