backup

back-up · noun

imported

Definitions

noun

  1. 1.

    (Computing) A copy of data stored separately for safety.

  2. 2.

    A person or thing that serves as a substitute or support.

  3. 3.

    A blockage or accumulation causing delay.

  4. 4.

    Serving as a substitute or reserve.

Forms

plural: backups

Phrases & expressions

  • •
    backup copy — A duplicate for safety purposes.
  • •
    backup plan — An alternative strategy.
  • •
    call for backup — To request assistance (especially police).

Related words

See also: copy, data, reserve, support
Synonyms: copy, reserve, substitute, support

Etymology

From the phrasal verb back up, nominalized in the 20th century.