What's the difference between
and
Enter two words to compare and contrast their definitions, origins, and synonyms to better understand how those words are related.

Car vs Null - What's the difference?

car | null |

In context|computing|lang=en terms the difference between car and null

is that car is (computing) the first part of a cons in lisp the first element of a list while null is (computing) the attribute of an entity that has no valid value.

As nouns the difference between car and null

is that car is (dated) a wheeled vehicle, drawn by a horse or other animal or car can be (computing) the first part of a cons in lisp the first element of a list while null is a non-existent or empty value or set of values.

As an adjective null is

having no validity, "null and void".

As a verb null is

to nullify; to annul.

car

English

Etymology 1

From (etyl) (m), from (etyl) (m) (from .

Noun

(en noun)
  • (dated) A wheeled vehicle, drawn by a horse or other animal.
  • A wheeled vehicle that moves independently, with at least three wheels, powered mechanically, steered by a driver and mostly for personal transportation; a motorcar or automobile.
    • She drove her car to the mall.
  • * {{quote-book, year=2006, author=
    • , title=Internal Combustion , chapter=1 citation , passage=If successful, Edison and Ford—in 1914—would move society away from the ever more expensive and then universally known killing hazards of gasoline cars : […] .}}
  • (rail transport, chiefly, North America) An unpowered unit in a railroad train.
    • The conductor coupled the cars to the locomotive.
  • (rail transport) an individual vehicle, powered or unpowered, in a multiple unit.
    • The 11:10 to London was operated by a 4-car diesel multiple unit
  • (rail transport) A passenger-carrying unit in a subway or elevated train, whether powered or not.
    • From the front-most car of the subway, he filmed the progress through the tunnel.
  • A rough unit of quantity approximating the amount which would fill a railroad car.
    • We ordered five hundred cars of gypsum.
  • The moving, load-carrying component of an elevator or other cable-drawn transport mechanism.
    • Fix the car of the express elevator - the door is sticking.
  • The passenger-carrying portion of certain amusement park rides, such as Ferris wheels.
    • The most exciting part of riding a Ferris wheel is when your car goes over the top.
  • The part of an airship, such as a balloon or dirigible, which houses the passengers and control apparatus.
  • * {{quote-book, 1850, , 3= A System of Aeronautics, page=152
    • , passage=Everything being apparently in readiness now, I stepped into the car of the balloon,
  • (sailing) A sliding fitting that runs along a track.
  • * {{quote-book, 1995, Ken Textor, The New Book of Sail Trim, page=201 citation
    • , passage=On boats 25 feet or more, it is best to mount a mast car and track on the front of the mast so you can adjust the height of the pole above the deck }}
  • (uncountable, US) The aggregate of desirable characteristics of a car.
    • Buy now! You can get more car for your money.
  • (US) A floating perforated box for living fish.
    • Image:TOYOTA FCHV 01.jpg, A hydrogen-powered car . Image:Train wagons 0834.jpg, Freight cars . Image:RandenTrain.jpg, A self-propelled passenger car . Image:Ferris wheel - melbourne show 2005.jpg, Ferris wheel cars . Image:Traveller (sailing).jpg, Car on a sailboat. Image:ZeppelinLZ127b.jpg, Car of a Zeppelin. Image:240 Sparks Elevators.jpg, Elevator cars .
    Synonyms
    * (private vehicle that moves independently) auto, motorcar, vehicle; automobile (US), motor (British colloquial), carriage (obsolete) * (non-powered part of a train) railcar, wagon * (unit of quantity) carload, wagonload * (passenger-carrying light rail unit) carriage * (part of an airship) gondola, basket (balloons only) * See also
    Derived terms
    * * * * * , (l) * (l) * * * * * * , (l) * * (l) * * *

    See also

    * bus * truck * van

    Etymology 2

    Acronym of c'''ontents]] of the '''a'''ddress part of [[register, '''r egister number . Note that it was based on original hardware and has no meaning today.

    Noun

    (en noun)
  • (computing) The first part of a cons in LISP. The first element of a list
  • * Matt Kaufmann, Panagiotis Manolios, and J Strother Moore, Computer-aided reasoning: an approach , 2000 :
    • The elements of a list are the successive cars''' along the "cdr chain." That is, the elements are the '''car''', the '''car''' of the cdr, the '''car of the cdr of the cdr, etc.
    Antonyms
    *
    Derived terms
    * *
    Related terms
    * *

    Anagrams

    * * * 1000 English basic words ----

    null

    English

    Noun

    (en noun)
  • A non-existent or empty value or set of values.
  • Zero]] quantity of [[expression, expressions; nothing.
    • (Francis Bacon)
  • Something that has no force or meaning.
  • (computing) the ASCII or Unicode character (), represented by a zero value, that indicates no character and is sometimes used as a string terminator.
  • (computing) the attribute of an entity that has no valid value.
    • Since no date of birth was entered for the patient, his age is null .
  • One of the beads in nulled work.
  • (statistics) null hypothesis

    • Adjective

    (en adjective)
  • Having no validity, "null and void"
  • insignificant
  • * 1924 , Marcel Proust, Within a Budding Grove :
    • In proportion as we descend the social scale our snobbishness fastens on to mere nothings which are perhaps no more null than the distinctions observed by the aristocracy, but, being more obscure, more peculiar to the individual, take us more by surprise.
  • absent or non-existent
  • (mathematics) of the null set
  • (mathematics) of or comprising a value of precisely zero
  • (genetics, of a mutation) causing a complete loss of gene function, amorphic.

    • Derived terms

    * nullity

    Verb

    (en verb)
  • to nullify; to annul
    • (Milton)

    Related terms

    * annul

    See also

    * nil ----