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Don vs Undefined - What's the difference?

don | undefined |

As a noun don

is (science) (dissolved organic nitrogen).

As an adjective undefined is

lacking a definition or value.

don

English

Etymology 1

From (etyl) dominus'', "lord", "head of household", akin to Spanish ''don'' and Italian ''dom''; from ''domus'', "house", + diminutive suffix ''-inus . Compare dominie.

Noun

(en noun)
  • A university professor, particularly one at Oxford or Cambridge.
  • A mafia boss.
    • Derived terms
    * donnish

    Etymology 2

    A contraction of (etyl) do on. Compare also doff.

    Verb

    (donn)
  • (clothing) to put on, to dress in
    • To don one's clothes.
    Antonyms
    * (put on clothes)
    See also
    * (l) * (l)

    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