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Formerly vs Undefined - What's the difference?

formerly | undefined |

As an adverb formerly

is at some time in the past.

As an adjective undefined is

lacking a definition or value.

formerly

English

Adverb

(-)
  • at some time in the past
  • previously; once

    • 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