One-off

adj, noun

Definitions

Adjective
  1. 1
    Occurring once, independent of any pattern; one-time.

    "The government insisted that the embarrassing loss of the tax records was a one-off event."

  2. 2
    Special; remarkable; rare; unusual.

    "BMW is to create a one-off tribute to the iconic 3.0 CSL."

Noun
  1. 1
    Something that is done, created, etc. only once, and often quickly, simply, or improvisationally. Commonwealth, idiomatic

    "Near-synonym: stand-alone"

  2. 2
    a happening that occurs only once and is not repeated wordnet
  3. 3
    Something unique and remarkable.

    "Near-synonym: stand-alone"

Etymology

Etymology 1

From one + off. Probably from foundry work, for which making reusable molds is expensive and expediency makes the rule for molds not to be used only once. A term long used by artists who are printmakers and sculptors to indicate a unique print or casting. If using traditional edition numbering, a one-off would be a "1/1", which is said, "one of one" meaning the first print in an edition of one.

Etymology 2

From one + off. Probably from foundry work, for which making reusable molds is expensive and expediency makes the rule for molds not to be used only once. A term long used by artists who are printmakers and sculptors to indicate a unique print or casting. If using traditional edition numbering, a one-off would be a "1/1", which is said, "one of one" meaning the first print in an edition of one.

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