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Mach vs Undefined - What's the difference?

mach | undefined |

As a verb mach

is sneak.

As an adjective undefined is

lacking a definition or value.

mach

English

Proper noun

(en proper noun)
  • , Austrian physicist 1838 - 1916.

    • Noun

    (-)
  • (physics) a ratio of the speed (of an object, etc.) to the speed of sound in the fluid or other medium through which the object travels. Usually used to describe supersonic speeds.
    • The jet traveled at Mach 3.
  • (physics) the Mach number

    • Usage notes

    * Never plural. * Always precedes the number, as in the example above.

    Anagrams

    * English eponyms ----

    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