✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

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.
Zavala, like Alexandre, quit her job a year and a half ago and jumped in headfirst. Max Klaver, Miami Herald, 21 Nov. 2025 After making the move to Los Angeles, Schwan dove into the world of horror headfirst, directing Death Snot (2022) and Mr. Sunshine (2023), both of which played at festivals such as Palm Springs, Beyond Fest, Telluride Horror Show, and FilmQuest. Anthony D'alessandro, Deadline, 14 Nov. 2025 This planetary placement encourages us to dive headfirst into romance without looking back. Lisa Stardust, Refinery29, 4 Nov. 2025 Throughout their travels, the women dive headfirst into new experiences like bungee jumping and feeding giraffes, pushing them out of their comfort zones and into vulnerable moments. Elizabeth Ayoola, Essence, 24 Oct. 2025 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

Browse Nearby Words

Cite this Entry

“Headfirst.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/headfirst. Accessed 5 Dec. 2025.

Kids Definition

headfirst

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

More from Merriam-Webster on headfirst

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!