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Informal vs Undefined - What's the difference?

informal | undefined |

As a verb informal

is to inform (to communicate knowledge to others).

As an adjective undefined is

lacking a definition or value.

informal

English

Adjective

(en adjective)
  • Not formal or ceremonious.
  • *, chapter=3
    • , title= The Mirror and the Lamp , passage=One saint's day in mid-term a certain newly appointed suffragan-bishop came to the school chapel, and there preached on “The Inner Life.”  He at once secured attention by his informal method, and when presently the coughing of Jarvis […] interrupted the sermon, he altogether captivated his audience with a remark about cough lozenges being cheap and easily procurable.}}
  • Not in accord with the usual regulations.
  • Suited for everyday use.
  • (of language) Reflecting everyday, non-ceremonious usage.
  • (gardening) Not organized; not structured or planned.

    • Related terms

    * informality * informally

    Synonyms

    * (not formal or ceremonious) casual * (not in accord with the usual regulations) unofficial * (suited for everyday use) casual * colloquial

    Antonyms

    * formal

    Anagrams

    * ----

    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