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Ion vs Undefined - What's the difference?

ion | undefined |

As a noun ion

is ion (electrically charged atom).

As an adjective undefined is

lacking a definition or value.

ion

English

(wikipedia ion)

Noun

(en noun)
  • An atom or group of atoms bearing an electrical charge such as the sodium and chlorine atoms in a salt solution.

    • Derived terms

    * anion * autoion * byion * cation * coion * counterion * gegenion * ionic * ionise, ionize * ionogenic * ionome * macroion * microion * multiion * nebenion * photoion * polyion * sulphion * thermion

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined