英和和英

動詞

back up (三人称単数 現在形 backs up, 現在分詞 backing up, 過去形および過去分詞形 backed up)

1. (idiomatic, intransitive) To move backwards, especially for a vehicle to do so.

   Coordinate terms: back away, back off, stand back

   That beeping sound indicates that the truck is backing up.

   • 1897 December (indicated as 1898), Winston Churchill, chapter V, in The Celebrity: An Episode, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., Ltd., →OCLC:

     We expressed our readiness, and in ten minutes were in the station wagon, rolling rapidly down the long drive, for it was then after nine. […] As we reached the lodge we heard the whistle, and we backed up against one side of the platform as the train pulled up at the other.

2. (idiomatic, transitive) To move a vehicle backwards.

   Synonym: reverse

   Hyponym: back out

   Back up the car a little, you're blocking the driveway.

3. (idiomatic, intransitive) To undo one's actions.

   Synonym: back out

   I couldn't see how to finish the project, so I backed up and tried it another way.

4. (idiomatic, intransitive) To reconsider one's thoughts.

   This isn't working. Let's back up and think about it.

5. (idiomatic, computing, transitive) To copy (data) so that it can be restored if the main copy is lost.

   Back up your documents folder before applying the update.

6. (idiomatic, transitive) To provide support or the promise of support to.

   Synonyms: back, support

   You should be careful. This guy is backed up by the local gang.

   When he said I wasn't there, I told him I was, and my buddy backed me up.

   • 2017, BioWare, Mass Effect: Andromeda (Science Fiction), Redwood City: Electronic Arts, →OCLC, PC, scene: Update on Jaal:

     Thank you for backing me up. I know it's not easy delivering bad news-especially to a friend-but sometimes it's the only way we can move forward and begin to heal.

   • 2020 May 6, Tim Dunn, “The Architecture The Railways Built”, in Rail, page 76:

     Researching and corroborating facts to put in my script is one thing, but getting sources to back up the assertions of interviewed contributors can be quite another.

7. (idiomatic, intransitive, cricket) For the non-striker to take a few steps down the pitch, in preparation to taking a run, just as the bowler bowls the ball.
8. (idiomatic, intransitive, cricket) For a fielder to position himself behind the wicket (relative to a team-mate who is throwing the ball at the wicket) so as to stop the ball, and prevent overthrows.
9. (idiomatic, intransitive, of a blockage) To halt the flow or movement of something.

   Synonym: plug up

   When I flushed the toilet, the plumbing backed up and burst.

10. (idiomatic, intransitive, informal) To fill up because of a backlog.

    Synonym: fall behind

    • 1995, "Oubliette" (episode of The X-Files TV series)

      WAITRESS: Hurry up with those drinks, Lucy. We're backing up. (Grabs the drinks LUCY has poured.) What are you doing? These are regular. They all ordered large.

派生語

• backupable

参考

• back down
• back into
• back off
• back out

アナグラム

• upback

語源

back + up

名詞

backup (複数形 backups)

1. A reserve or substitute.

   If the goalkeeper is injured, we have a backup.

2. (computing) 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.

   After the power failure, we had to restore the database from backup.

3. An accumulation of material that halts the flow or movement of something.

   The blockage caused a backup in the plumbing.

4. (law enforcement) reinforcements

   He's got a gun - you better send for backup.

同意語

• (reserve): reserve, stand-in, spare, substitute
• (コンピューター: copy of a file または record):
• (accumulation of material that halts flow): block, blockage

形容詞

backup (not comparable)

1. standby, reserve or extra

   I am only a backup player.

2. (computing) That is intended as a backup.

   Make a backup copy of that file.

同意語

• (reserve): extra, reserve, spare, standby

使用する際の注意点

Back-up is an alternative spelling of backup. Both spellings are used as either a noun or an adjective. The verb phrase back up is always spelled as two words and never with a hyphen, and is not used as either an noun or an adjective.