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Fog vs Undefined - What's the difference?

fog | undefined |

As a noun fog

is (label) a thick cloud that forms near the ground; the obscurity of such a cloud or fog can be a new growth of grass appearing on a field that has been mowed or grazed.

As a verb fog

is to become covered with or as if with fog or fog can be to pasture cattle on the fog, or aftergrass, of; to eat off the fog from.

As an adjective undefined is

lacking a definition or value.

fog

English

(wikipedia fog)

Etymology 1

Origin uncertain; perhaps a or perhaps related to the Dutch vocht and German feucht (moisture)

Noun

  • (label) A thick cloud that forms near the ground; the obscurity of such a cloud.
  • *
  • *:Thus the red damask curtains which now shut out the fog -laden, drizzling atmosphere of the Marylebone Road, had cost a mere song, and yet they might have been warranted to last another thirty years. A great bargain also had been the excellent Axminster carpet which covered the floor;.
  • (label) A mist or film clouding a surface.
  • A state of mind characterized by lethargy and confusion.
  • :
  • *, chapter=4
    • , title= Mr. Pratt's Patients , passage=I was on my way to the door, but all at once, through the fog in my head, I began to sight one reef that I hadn't paid any attention to afore.}}
  • (label) A silver deposit or other blur on a negative or developed photographic image.
    • Usage notes
    * To count sense thick cloud , bank of fog is usually used. * To count sense clouding a surface , foggy patch is usually used.
    Synonyms
    * (cloud that forms at a low altitude and obscures vision) mist, haze * (mist or film clouding a surface) steam * (state of mind characterized by lethargy and confusion) daze, haze
    Derived terms
    * fog bank * fogbell * fogbound * foggy * foghorn * fog lamp * fog layer * fog light * fog of war * fog signal * in a fog * fog drip

    Verb

    (fogg)
  • To become covered with or as if with fog.
  • To become obscured in condensation or water.
    • The mirror fogged every time he showered.
  • (photography) To become dim or obscure.
  • To cover with or as if with fog.
  • * 1968 , Eighth Annual Report , Metropolitan Corporation of Greater Winnipeg, p 7:
    • Fogging' for adult mosquito control began on June 4th in residential areas. Until September 25th, the Metro area was ' fogged eleven times, using nine truck-mounted foggers, eight hand swing foggers, and two boats.
  • To obscure in condensation or water.
  • *
  • To make confusing or obscure.
  • (photography) To make dim or obscure.
  • To practice in a small or mean way; to pettifog.
  • * Dryden
    • Where wouldst thou fog to get a fee?
    Synonyms
    * (to become obscured in condensation or water) become cloudy, become steamy * (to make confusing or obscure) blur, cloud, obscure

    Etymology 2

    Origin uncertain; compare Norwegian fogg .

    Noun

    (-)
  • A new growth of grass appearing on a field that has been mowed or grazed.
  • (UK, dialect) Tall and decaying grass left standing after the cutting or grazing season; foggage.
    • (Halliwell)
  • (Scotland) Moss.
    • Derived terms
    * fogey * fogram * fogrum * fogy

    Verb

    (fogg)
  • To pasture cattle on the fog, or aftergrass, of; to eat off the fog from.

    • References

    * * ----

    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