headfirst

adverb

head·​first ˈhed-ˈfərst How to pronounce headfirst (audio)
Synonyms of headfirstnext
1
: with the head foremost
dove headfirst into the waves
2
headfirst adjective

Examples of headfirst in a Sentence

She dove into the water headfirst. She rushed into the relationship headfirst.
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.
Riders race headfirst through four side-by-side lanes, including a 360-degree loop. Taylor Haught, Kansas City Star, 28 Apr. 2026 Believing in her innocence, Shade and Angie dive headfirst back into the high-stakes world of investigation. Peter White, Deadline, 27 Apr. 2026 Never dive headfirst into surf, which puts you at greater risk of injuring your head, neck and spine. Helen Carefoot, Flow Space, 23 Apr. 2026 The unstoppable force of professional golf is running headfirst into the unmovable object that is the Dallas-Fort Worth region, which is attracting a growing number of large companies. Javier David, Dallas Morning News, 12 Apr. 2026 See All Example Sentences for headfirst

Word History

First Known Use

1790, in the meaning defined at sense 1

Time Traveler
The first known use of headfirst was in 1790

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Cite this Entry

“Headfirst.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/headfirst. Accessed 13 May. 2026.

Kids Definition

headfirst

adverb
head·​first ˈhed-ˈfərst How to pronounce headfirst (audio)
: with the head foremost
headfirst adjective

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