What's the difference between
and
Enter two words to compare and contrast their definitions, origins, and synonyms to better understand how those words are related.

Rust vs Undefined - What's the difference?

rust | undefined |

As a verb rust

is to grow.

As an adjective undefined is

lacking a definition or value.

rust

English

(wikipedia rust)

Noun

(en noun)
  • The deteriorated state of iron or steel as a result of moisture and oxidation.
    • The rust on my bicycle chain made cycling to work very dangerous.
  • A similar substance based on another metal (usually with qualification, such as "copper rust").
    • aerugo. Green or blue-green copper rust ; verdigris. (American Heritage Dictionary, 1973)
  • A reddish-brown color.
  • A disease of plants caused by a reddish-brown fungus.
    • (-)

    Derived terms

    * cedar-apple rust * coffee rust * Rust Belt * rust bucket * rust fungus * rust mite * rustproof * rusty * stem rust * wheat rust * white pine blister rust * white rust

    Verb

    (en verb)
  • to oxidize, especially of iron or steel.
    • The patio furniture had rusted in the wind-driven spray.
  • to cause to oxidize.
    • The wind-driven spray had thoroughly rusted the patio furniture.
  • To be affected with the parasitic fungus called rust.
  • (figuratively) To degenerate in idleness; to become dull or impaired by inaction.
  • * Dryden
    • Must I rust in Egypt? never more / Appear in arms, and be the chief of Greece?

    Synonyms

    * oxidise / oxidize * corrode

    See also

    * aeciospore * ferric oxide * ferruginous * rouille * rubiginous *

    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