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Retro vs Undefined - What's the difference?

retro | undefined |

As adjectives the difference between retro and undefined

is that retro is (l) (imitative of past trends) while undefined is lacking a definition or value.

retro

English

Adjective

(en adjective)
  • of, or relating to, the past, past times, or the way things were
  • * '>citation
  • affecting things past; retroactive, ex post facto

    • Noun

    (wikipedia retro) (en-noun)
  • something, such as a fashion, from the past; a retro trend
  • a retrorocket
    • ----

    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