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Tab vs Undefined - What's the difference?

tab | undefined |

As a noun tab

is a key on computer keyboards.

As an adjective undefined is

lacking a definition or value.

tab

English

Etymology 1

First attested 1607, of uncertain origin.

Noun

(en noun)
  • A small flap or strip of material attached to something, for holding, manipulation, identification, etc.
  • * 1993 , Irvine Welsh: Trainspotting , p 333:
    • He pulls off his belt, cursing as the studs catch in the tabs of his jeans.
  • (by extension, graphical user interface) A navigational widget for switching between sets of controls or documents.
  • (label) A tablet, especially one containing illicit drugs.
  • A fast march or run with full kit.

    • Verb

  • Mark with a tab.
  • (computing) To use the Tab key on a computer or typewriter to navigate the screen or page.
  • * 2010 , Chris Anderson, Pro Business Applications with Silverlight 4 (page 210)
    • You can prevent a control from getting the focus when the user is tabbing between controls by settings its IsTabStop property to False.
  • Short for tabulate.
    • Derived terms
    * keep tabs on * tabbed

    Etymology 2

    Apocopation (shortening) of tabulation.

    Noun

    (en noun)
  • (informal) A restaurant bill.
  • (slang) Credit account, e.g., in a shop or bar.
    • Put this round on my tab , will you, barman.
  • Short for tabulator.
  • (computing) A space character ((tab)) that extends to the next aligned column, traditionally used for tabulation.
    • Derived terms
    * pick up the tab

    Etymology 3

    Likely to have been formed by clipping the Geordie pronunciation of the word or alternatively from the brand name Ogden's Tabs .

    Noun

    (en noun)
  • (Geordie and Mackem) cigarette.
    • Giv'is a tab man!

    References

    *

    Etymology 4

    Shortening of tablature.

    Noun

    (en noun)
  • A form of musical notation indicating fingering rather than the pitch of notes, commonly used for stringed instruments.

    • Etymology 5

    Derived from the Latin Cantabrigia (often shortened to Cantab.).

    Noun

  • (rfv-sense)(slang) A student of Cambridge University.

    • Etymology 6

    Noun

    (en noun)
  • (label) A tabloid newspaper.
  • * 1999 , George H. Douglas, The Golden Age of the Newspaper, p. 229:
  • * 2010 , Robert Lusetich, Unplayable: An Inside Account of Tiger's Most Tumultuous Season:

    • Anagrams

    * * * * English clippings ----

    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