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

Proper nutrition ensures that vitamin C, zinc, and amino acids support collagen formation internally, while topical use of sunblock can decrease collagen degradation caused by UV damage. —Cierra Black, Essence, 18 Apr. 2025

This event will happen rain or shine; closed-toed shoes, hats and sunblock are recommended. —Anne Gelhaus, The Mercury News, 16 Feb. 2025

Teaching natural consequences shouldn’t put your kid in harm's way—which means putting your foot down on essentials like wearing a helmet or putting on sunblock at the beach. —Lauryn Higgins, Parents, 16 Jan. 2025

The bathrooms also feature sunblock artwork in the bathrooms, which was chosen because Palm Springs has more than 300 days of sunshine per year. —Amanda Lauren, Forbes, 27 Dec. 2024

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