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Reconnaissance vs Undefined - What's the difference?

reconnaissance | undefined |

As a noun reconnaissance

is the act of scouting or exploring (especially military or medical) to gain information.

As an adjective undefined is

lacking a definition or value.

reconnaissance

English

(wikipedia reconnaissance)

Alternative forms

* recce (abbreviation) * recon (abbreviation)

Noun

  • The act of scouting or exploring (especially military or medical) to gain information.
  • * 1973 , Arthur C. Clarke, Rendezvous with Rama
    • The third member, Sergeant Pieter Rousseau, had been with the back-up teams at the Hub; he was an expert on space reconnaissance instrumentation, but on this trip he would have to depend on his own eyes and a small portable telescope.

    Related terms

    * reconnoiter, reconnoitre ----

    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