Definition of SPF

sun protection factor
Buying Guide

Our Reviews team has selected the best sunscreen.

Learn More About SPF

Dictionary Entries Near SPF

Spezia

SPF

spg

See More Nearby Entries 

Statistics for SPF

Cite this Entry

“SPF.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/SPF. Accessed 20 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for SPF

SPF

noun
\ ˌes-(ˌ)pē-ˈef How to pronounce SPF (audio) \

Medical Definition of SPF

: a number assigned to a sunscreen that is the factor by which the time required for unprotected skin to become sunburned is increased when the sunscreen is used

called also sun protection factor

WORD OF THE DAY

Test Your Vocabulary

Eponyms: Words Named After People

True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!