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Erstwhile vs Undefined - What's the difference?

erstwhile | undefined |

As adjectives the difference between erstwhile and undefined

is that erstwhile is (literary|legal) former, previous while undefined is lacking a definition or value.

As an adverb erstwhile

is formerly; in the past.

erstwhile

English

Adverb

(-)
  • Formerly; in the past.

    • Synonyms

    * erewhile

    Adjective

    (-)
  • (literary, legal) Former, previous.
  • *{{quote-book, year=1905, author=
    • , title= , chapter=2 citation , passage=“Scarcely had Alice reached her twentieth birthday, than she gave her erstwhile fiancée [sic] his formal congé. […]”}}

    Synonyms

    * former, once, previous, quondam, onetime * See also

    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