memory foam

noun

: a dense polyurethane foam that becomes more pliable when in contact with heat

Examples of memory foam in a Sentence

Recent Examples on the Web
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The space program has led to the invention of heart rate monitoring technology, scratch-resistance lenses, memory foam mattresses, rechargeable batteries, wireless headphones, the Jaws of Life rescue tool, GPS and even banking technology. Sarah D. Wire, USA Today, 23 Mar. 2026 The memory foam earcups offer reasonable padding; a little more would have been welcome. Christian De Looper, PC Magazine, 23 Mar. 2026 Understanding the difference between the best types of mattresses—hybrid, memory foam, latex, and innerspring—is crucial for a comfortable sleep setup. Nashia Baker, Architectural Digest, 19 Mar. 2026 The memory foam core features a wave design that supports your head and prevents it from nodding side-to-side. Bestreviews, Chicago Tribune, 16 Mar. 2026 See All Example Sentences for memory foam

Word History

First Known Use

1977, in the meaning defined above

Time Traveler
The first known use of memory foam was in 1977

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Cite this Entry

“Memory foam.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/memory%20foam. Accessed 30 Mar. 2026.

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