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

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

Wear a broad-spectrum, SPF 30 or higher water-resistant sunblock every day. —Ann Pietrangelo, Verywell Health, 16 May 2025

Just keep one thing in mind: Austin days can be scorchers, even in October, so don’t leave your sunblock at home. —Dan Reilly, Vulture, 9 Apr. 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