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.
Hairstylist Marissa Marino, who often works with Gomez, parted the star's hair in the center and styled it as straight and sleek as possible, probably with a very hot flat iron. Kara Nesvig, Allure, 2 May 2025 Blow-dry and flat iron your hair during this time to fully activate the formula. Conçetta Ciarlo, Vogue, 18 Apr. 2025 From TikTok to Instagram, this straightening brush gives serious results that have more body than a flat iron. Claire Rutter, Rolling Stone, 21 Nov. 2024 Apply to dry hair before using a curling iron or flat iron for loose, natural waves. Conçetta Ciarlo, Vogue, 1 May 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 21 May. 2025.

Kids Definition

flatiron

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