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

Examples of sunblock in a Sentence

Recent Examples on the Web

Kids darted among game booths, waving miniature Panthers flags, and volunteers handed out popsicles and sunblock. —Kaitlyn Pohly, Miami Herald, 22 June 2025

With his fluffy white coat, a life vest strapped across his chest and sunblock slathered on his long nose, the two-year-old Standard Poodle cuts an unusual figure, as Spanish dog beach rescue squads generally use Labradors and Newfoundlands. —CNN Money, 16 June 2025

Gather your camping chairs, sunblock and cold drinks, because the north suburbs have plenty of fun planned for the Fourth of July holiday. —Pioneer Press, Chicago Tribune, 25 June 2025

Check the weather: Your favorite weather app should have a wealth of information about UV index (for sunblock purposes), heat warnings and the feels-like temperature. —Jeanine Santucci, USA Today, 21 June 2025

Word History

First Known Use

1953, in the meaning defined above

Rhymes for sunblock

• alcock
• beanstalk
• bedrock
• boardwalk
• catwalk
• cornstalk
• crosswalk
• deadlock
• feedstock
• fetlock
• flintlock
• goshawk

Kids Definition

sunblock

noun

sun·​block -ˌbläk 

: a preparation (as a lotion) applied to the skin to prevent sunburn (as by physically blocking out the sun's rays)

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