outermost

adjective

out·​er·​most ˈau̇-tər-ˌmōst How to pronounce outermost (audio)
: farthest out

Examples of outermost in a Sentence

The arrow hit the outermost ring on the target. the outermost planet in our solar system
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Of these, seven showed clear anti-aging effects when tested directly on aged human fibroblasts (cells that form connective tissue) and keratinocytes (the major cell type of the outermost layers of the skin) in the lab. New Atlas, 10 Aug. 2025 They’re housed in an acidic formulation, so as not to disturb the skin’s acid mantle (the outermost layer of the barrier), and deliver unmatched hydration and comfort to skin. Deanna Pai, Vogue, 4 Aug. 2025 The outermost layer of skin, known as the epidermis, is made up of a fibrous protein called keratin, which is produced by skin cells called keratinocytes, Dr. Gohara explains. Victoria Moorhouse, Allure, 30 July 2025 Earth’s lithosphere, the outermost rocky layer, rests upon a semi-fluid layer of the upper mantle. Jay Kakade july 30, New Atlas, 30 July 2025 See All Example Sentences for outermost

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of outermost was in the 14th century

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Cite this Entry

“Outermost.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/outermost. Accessed 19 Aug. 2025.

Kids Definition

outermost

adjective
out·​er·​most ˈau̇t-ər-ˌmōst How to pronounce outermost (audio)
: farthest out

More from Merriam-Webster on outermost

Last Updated: - Updated example sentences
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