flat iron

noun

1
: a device used for straightening hair by pressing and pulling sections between two heated metal or ceramic, flat, rectangular plates
2
usually flatiron old-fashioned : iron sense 2a

Examples of flat iron in a Sentence

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.
Upgrade your hot tools with a flat iron and an ionic hair dryer that are both under $30. Nicol Natale, PEOPLE, 28 Dec. 2025 Photograph: Kat Merck Dyson Corrale $540 $399 (26% off) Amazon $540 $400 (26% off) Dyson Dyson quality in a flat iron with no cord—style anywhere in your house or on the go! Louryn Strampe, Wired News, 2 Dec. 2025 Right now, take over $100 over our editors' favorite Airwrap multi-styler and Airstrait flat iron/hair dryer at Nordstrom. Malia Griggs, Glamour, 14 Oct. 2025 Offerings include prime filets, ribeye, New York strip and flat iron. Susan Selasky, Freep.com, 9 Oct. 2025 See All Example Sentences for flat iron

Word History

First Known Use

1743, in the meaning defined at sense 2

Time Traveler
The first known use of flat iron was in 1743

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Cite this Entry

“Flat iron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flat%20iron. Accessed 9 Jan. 2026.

Kids Definition

flatiron

noun
flat·​iron -ˌī(-ə)rn How to pronounce flatiron (audio)
Last Updated: - Updated example sentences
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