backup

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backup

A traffic backup stretched for miles on the highway.

Definition

Noun: 1. Support or reinforcement: The act of providing assistance, approval, or supplementary aid. 2. A reserve or substitute: A person or thing held in reserve to serve as a substitute or provide additional support if needed. 3. A copy for safekeeping: In computing, a duplicate copy of data or a file, stored separately to be used if the original is lost, damaged, or erased. 4. A musical accompaniment: A vocal or instrumental part that supports or provides background for the main musical part. 5. A blockage or accumulation: A situation where things are stopped from flowing or moving, causing an accumulation or congestion.

Usage Examples
  • As support/reinforcement:
    • The police called for backup before entering the building.
    • Do you have a backup plan if it rains?
  • As a reserve/substitute:
    • The injured goalkeeper was replaced by the backup.
    • She is the backup singer for the lead vocalist.
  • As a copy in computing:
    • Always create a backup of your important documents.
    • I lost my essay, but fortunately I had a backup on my external drive.
  • As a blockage:
    • There is a huge traffic backup on the highway due to an accident.
    • A backup in the sewer line caused flooding in the basement.
Advanced Usage
  • "To have (someone's) back": This idiom is conceptually related to "backup," meaning to be ready to support or defend someone.
    • Don't worry, I have your back in the meeting.
  • Functioning as an adjective: The word "backup" is commonly used attributively (before a noun) to describe something that serves as a reserve.
    • We need to test the backup generator.
    • He is the backup quarterback for the team.
Variants and Related Words
  • Back up (phrasal verb): To move backwards, or to provide support or make a copy.
    • Please back up your car so I can get out.
    • You should back up your claims with evidence.
    • Remember to back up your computer files regularly.
Synonyms
  • Support, aid, assistance (for meaning 1).
  • Reserve, substitute, stand-in, understudy (for meaning 2).
  • Copy, duplicate, archive (for meaning 3).
  • Accompaniment (for meaning 4).
  • Congestion, jam, blockage, stoppage (for meaning 5).
Related Phrases and Idioms
  • "As a backup" / "for backup": For use as a reserve or substitute.
    • Bring an umbrella as a backup.
    • We keep extra batteries for backup.
  • "Backup and running": Restored to normal operation after a failure (often used for systems or machines).
    • The server is backup and running after the crash.
backup

A traffic backup stretched for miles on the highway.

Noun
  1. the act of providing approval and support
    • his vigorous backing of the conservatives got him in trouble with progressives
  2. (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
  3. a musical part (vocal or instrumental) that supports or provides background for other musical parts
  4. 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
  5. an accumulation caused by clogging or a stoppage
    • a traffic backup on the main street
    • he discovered a backup in the toilet

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