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Showing results for SPF. Search instead for SPFN.

SPF

American  

abbreviation

  1. sun protection factor: the effectiveness of a sunscreen in protecting the skin from the sun's ultraviolet UVB radiation, as rated on a scale of increasing protectiveness, the number being the ratio of the radiation dose needed to produce minimal redness when using sunscreen compared to the dose needed to produce the same redness without sunscreen.

    An SPF of 15 will allow you to stay in the sun 15 times longer.
SPF 1 British  

abbreviation

  1. sender policy framework: a mechanism designed to prevent an e-mail address being duplicated and used as a false address from which to send unsolicited e-mails

  2. sun protection factor: an indicator of how effectively a sun cream, lotion, cosmetic, etc, protects the skin from the harmful rays of the sun

    SPF 25
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
S.P.F. 2 British  

abbreviation

  1. vet science specific pathogen free; denoting animals specially bred to ensure that they are free of specified diseases

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In one instance, a product by Ultra Violette claimed to have an SPF rating of 50+, but testing showed it had an SPF of four, leading to a voluntary recall of the product.

From BBC • Mar. 26, 2026

Labelling will also be reviewed, with a proposal to remove the SPF number rating on products and replace them with low, medium, high and very high labels.

From BBC • Mar. 26, 2026

However, Kelly said Choice did not support removing SPF number ratings.

From BBC • Mar. 26, 2026

My skin was tinged white from SPF 70 sunscreen.

From Los Angeles Times • Nov. 30, 2025

“Don’t you know anything about SPF? Skin cancer?”

From "Beauty Queens" by Libba Bray

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.