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Hallmark vs Undefined - What's the difference?

hallmark | undefined |

As a noun hallmark

is a distinguishing characteristic.

As a verb hallmark

is to provide or stamp with a hallmark.

As an adjective undefined is

lacking a definition or value.

hallmark

English

Noun

(wikipedia hallmark) (en noun)
  • A distinguishing characteristic.
  • * {{quote-news
    • , year=2011 , date=February 1 , author=Phil McNulty , title=Arsenal 2 - 1 Everton , work=BBC citation , page= , passage=Arsene Wenger's side showed little of the style and fluidity that is their hallmark but this was about digging deep and getting the job done, qualities they demonstrated and that will serve them well as the season reaches its climax.}}
  • An official marking made by a trusted party, usually an assay office, on items made of precious metals.
  • * 2007 . Zerzan, John. Silence .
    • It can highlight our embodiment, a qualitative step away from the hallmark machines that work so resolutely to disembody us.

    Verb

    (en verb)
  • To provide or stamp with a hallmark.
  • *{{quote-book, year=1905, author=
    • , title= , chapter=2 citation , passage=The cane was undoubtedly of foreign make, for it had a solid silver ferrule at one end, which was not English hall–marked .}}

    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