sunblock

noun sun·block \ ˈsən-ˌbläk \
Updated on: 20 Apr 2018

Definition of sunblock

: 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

Recent Examples of sunblock from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sunblock.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of sunblock

1955

in the meaning defined above

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SUNBLOCK Defined for English Language Learners

sunblock

Definition of sunblock for English Language Learners

  • : a lotion that you put on your skin to prevent sunburn by completely blocking out the sun's rays


SUNBLOCK Defined for Kids

sunblock

noun sun·block \ ˈsən-ˌbläk \

Definition of sunblock for Students

: a preparation applied to the skin to prevent sunburn usually by blocking the sun's ultraviolet radiation

Medical Dictionary

sunblock

noun sun·block \ ˈsən-ˌbläk \

medical Definition of sunblock

: 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


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