Word.ws English Dictionary

SPF

SPF is the initialism of sun protection factor.

SPF is the initialism of single point of failure.

SPF is the initialism of spray polyurethane foam.

SPF is the initialism of spruce-pine-fir.

SPF is the initialism of specific-pathogen-free.

SPF is the initialism of Scottish Police Federation.

Meaning of sun protection factor

Noun

sun protection factor (plural sun protection factors)

  1. An indication of how long a sunscreen remains effective when applied to the skin.
    • If someone normally burns in 10 minutes with no sunscreen, then a sunscreen with sun protection factor 20 will provide protection for up to 20 × 10 = 200 minutes.

Meaning of single point of failure

Noun

single point of failure (plural single points of failure)

  1. A component in a device, or a point in a network, that, if it were to fail, would cause the entire device or network to fail (normally eliminated by adding redundancy).
    • The Jesus nut got its name because it is a single point of failure — if it goes, there's nothing you can do but pray.
  2. (broadly) A minor mistake that creates a chain reaction.
    • The intact twine in Dylan's beef Wellington was a single point of failure.

Forms of SPF

pluralSPFs

Questions about SPF

What is SPF the initialism of?
SPF is the initialism of sun protection factor.

Words near SPF in the dictionary

  1. speyk
  2. Speyside
  3. Spezia
  4. Spezian
  5. spezzato
  6. SPF
  7. SPFA
  8. SPFS
  9. SPG
  10. SPGB
  11. SPGH

Source and license

Adapted from Wiktionary: SPF (page history and authors); sun protection factor (page history and authors); single point of failure (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “SPF.” Word.ws, https://word.ws/spf. Based on Wiktionary, CC BY-SA 4.0.