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English

Etymology

From back up

Alternative spellings


Noun

  1. A reserve or substitute.
  2. : If the goalkeeper is injured, we have a backup.
  3. A copy of a file or record, stored separately from the original, that can be used to recover the original if it is destroyed or damaged.
  4. : After the power failure, we had to restore the database from backup.
  5. An accumulation of material that halts the flow or movement of something.
  6. : The blockage caused a backup in the plumbing.


Synonyms


Translations

Adjective

  1. standby, reserve or extra
  2. : I am only a backup player.
  3. That is intended as a backup.
  4. : Make a backup copy of that file.


Synonyms


Usage notes

Back-up is an alternative spelling of backup. Both spellings see usage as noun or adjective. The verb back up is always spelled as two words and never with a hyphen.

Translations

fr:backup hu:backup pt:backup vi:backup zh:backup

GNU Project's publication of CIDE, the Collaborative International Dictionary of English backup \back"up\, n.
1. anything kept in reserve to serve as a substitute in case
of failure or unavailability of the normal or primary
object; -- used for devices, plans, people, etc. Also used
attributively; as, there was no backup for the electrical
supply; a backup motor; a backup generator.
[PJC]

2. (Music) a musician or group of musicians accompanying a
soloist, whether vocalists or instrumentalists.

Syn: accompaniment. [PJC]

3. a person or group of persons serving as reinforcement for
another or others; as, the policeman called for backup
when he was fired on.
[PJC]

4. an accumulation, overflow, or reverse flow (in traffic or
a liquid flow system) caused by a stoppage or other
malfunction.
[PJC]

5. (Computers) A copy of a program or data from a computer
onto a data-storage medium, usually one that may be
removed to safe storage at a distance from the computer;
it is used to preserve data for use in the contingency
that the original data on the computer may be lost or
become unusable. A backup that is removed from the
building housing the computer system (to provide
protection against loss of data in a disastrous event such
as a fire) is called off-site backup. Also used
attributively; as, backup copy.
[PJC]

6. (Computers) The act or process of creating a backup[5];
as, they performed a full system backup every weekend.
[PJC] Backward
WordNet backup
n 1: an accumulation caused by clogging or a stoppage; "a traffic
backup on the main street"; "he discovered a backup in
the toilet"
2: someone who takes the place of another (as when things get
dangerous or difficult); "the star had a stand-in for
dangerous scenes"; "we need extra employees for summer
fill-ins" [syn: stand-in, substitute, relief, reliever,
backup man, fill-in]
3: a subordinate musical part; provides background for more
important parts [syn: accompaniment, {musical
accompaniment}, support]
4: (computer science) a copy of a file or directory on a
separate storage device; "he made a backup in case the
original was accidentally damaged or erased" [syn: {computer
backup}]
5: the act of providing approval and support; "his vigorous
backing of the conservatives got him in trouble with
progressives" [syn: backing, championship, patronage]
Moby Dictionary
about-face , about-turn , advocate , agent , alter ego , alternate ,
alternative , amicus curiae , analogy , attorney , back track ,
back trail , backing , backing off , backing out , backing up ,
backup man , champion , change , changeling , comparison , copy ,
counterfeit , deputy , double , dummy , equal , equivalent , ersatz ,
exchange , executive officer , exponent , fake , figurehead , fill-in ,
ghost , ghostwriter , imitation , lieutenant , locum , locum tenens ,
makeshift , metaphor , metonymy , mock , next best thing , paranymph ,
personnel , phony , pinch , pinch hitter , pleader , procurator ,
provisional , proxy , relief , replacement , representative , reserve ,
reserves , reversal , reverse , reversing , reversion , right-about ,
right-about-face , ringer , second in command , second string ,
secondary , sign , spare , spares , stand-in , stopgap , sub ,
substituent , substitute , substitution , succedaneum , superseder ,
supplanter , surrogate , swingaround , symbol , synecdoche , temporary ,
tentative , third string , token , turnabout , turnaround , understudy ,
utility , utility man , utility player , vicar , vicar general ,
vicarious , vice , vice-president , vice-regent , vicegerent ,
volte-face


FOLDOC backup

(Sometimes "back up" when used as a verb) A
spare copy of a file, file system or other resource for use in
the event of failure or loss of the original.

The term is most commonly used to refer to a copy of all the
files on a computer's disks which is made periodically and
kept on magnetic tape or other removable medium (also called
a "dump").

This essential precaution is neglected by most new computer
users until the first time they experience a disk crash or
accidentally delete the only copy of the file they have been
working on for the last six months.

Ideally the backup copies should be kept at a different site
or in a fire safe since, though your hardware may be insured
against fire, the data on it is almost certainly neither
insured nor easily replaced.

See also differential backup, incremental backup, {full
backup}. Compare archive.

(2003-06-22)


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