sunblock
noun
sun·block ˈsən-ˌbläk 
: a preparation (such as a lotion) applied to the skin to prevent sunburn (as by physically blocking out ultraviolet radiation)
also : its active ingredient (such as titanium dioxide) compare sunscreen
Example Sentences
Recent Examples on the Web The teens also wrote letters of gratitude to tuck into each box, along with sunblock, chewing gum, playing cards, and assorted toiletries. 
Tonya Alanez, BostonGlobe.com, 11 Sep. 2022 January Jones swears by this physical sunblock that offers broad-spectrum protection without stifling the skin with a greasy white film. Noma Nazish, Forbes, 30 June 2022 There are more, and better, sunblock options than ever: nonaerosol spray, nongreasy face cream, and UV-blocking formulas made of zinc oxide, considered gentler on the environment. Will Taylor, Outside Online, 12 Aug. 2022 There’s a black-market sunblock that allows the vamps to be out in the SoCal daylight for maybe 20 minutes. Owen Gleiberman, Variety, 11 Aug. 2022 Beachgoers will find chardonnay sunblock and totes for sale, and a crate of records is up for grabs in the back. Diti Kohli, BostonGlobe.com, 3 Aug. 2022 Avobenzone, an oil-soluble dibenzoyl methane derivative that the FDA approved for use in sunblock formulas in 1988, works as a sunscreen agent by absorbing ultraviolet light. Jolie Kerr, Better Homes & Gardens, 7 July 2022 This shimmery, gel-like solid contains avobenzone, octisalate, and octocrylene—gold standard ingredients for chemical sunblock. Svati Kirsten Narula, Outside Online, 4 June 2022 Leatherwood said people should not forget the sunblock. Jake Sheridan, Chicago Tribune, 16 June 2022 See More
Tonya Alanez, BostonGlobe.com, 11 Sep. 2022 January Jones swears by this physical sunblock that offers broad-spectrum protection without stifling the skin with a greasy white film. Noma Nazish, Forbes, 30 June 2022 There are more, and better, sunblock options than ever: nonaerosol spray, nongreasy face cream, and UV-blocking formulas made of zinc oxide, considered gentler on the environment. Will Taylor, Outside Online, 12 Aug. 2022 There’s a black-market sunblock that allows the vamps to be out in the SoCal daylight for maybe 20 minutes. Owen Gleiberman, Variety, 11 Aug. 2022 Beachgoers will find chardonnay sunblock and totes for sale, and a crate of records is up for grabs in the back. Diti Kohli, BostonGlobe.com, 3 Aug. 2022 Avobenzone, an oil-soluble dibenzoyl methane derivative that the FDA approved for use in sunblock formulas in 1988, works as a sunscreen agent by absorbing ultraviolet light. Jolie Kerr, Better Homes & Gardens, 7 July 2022 This shimmery, gel-like solid contains avobenzone, octisalate, and octocrylene—gold standard ingredients for chemical sunblock. Svati Kirsten Narula, Outside Online, 4 June 2022 Leatherwood said people should not forget the sunblock. Jake Sheridan, Chicago Tribune, 16 June 2022 See More Word History
First Known Use
1953, in the meaning defined above
Kids Definition
sunblock
noun
sun·block ˈsən-ˌbläk
: a preparation applied to the skin to prevent sunburn usually by blocking the sun's ultraviolet radiation
Medical Definition
sunblock
noun
sun·block ˈsən-ˌbläk
: a preparation (as a lotion) applied to the skin to prevent sunburn (as by physically blocking out ultraviolet radiation)
also : its active ingredient (as titanium dioxide) compare sunscreen