head·​first | \ˈhed-ˈfərst \

Definition of headfirst 

1 : with the head foremost dove headfirst into the waves

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Other Words from headfirst

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

The industrialized nations of the world, hurtling headfirst into world war, began rationing steel for a select few purposes: ships, tanks, guns, and planes. Jonathan Schifman, Popular Mechanics, "The Entire History of Steel," 9 July 2018 Odubel Herrera slid headfirst into third base, helmet covering his eyes, and slapped the bag with his right hand. Scott Lauber, Philly.com, "Odubel Herrera leads Phillies to win over Pirates," 20 Apr. 2018 What makes his accomplishment even more amazing is that less than four years ago, Plain was nearly paralyzed while body surfing when a wave threw him headfirst into the sand and fractured several of his vertebrae. Steve Gardner, USA TODAY, "Reaching Mount Everest's peak, Australian sets '7 Summits' speed-climbing record," 16 May 2018 Less than a year after the death of her husband, René Angélil, Celine Dion is jumping headfirst into the music world once again. Megan Friedman, Good Housekeeping, "Pink Wrote a Brand-New Song for Celine Dion After René's Death," 8 July 2016 Bobiak, the team’s veteran center fielder, dove headfirst across home plate. Phil Anastasia, Philly.com, "Andrew Vail powers Gloucester Catholic into state final," 5 June 2018 Cities that suffer through winter tend to rush headfirst into the warmth. Daniel Arnold, New York Times, "It’s Spring, Right?," 19 May 2018 Provided/Paul Laufman Hamilton County Sheriff Jim Neil and the county have agreed to pay $500,000 to a man who suffered a broken hip and concussion after a corrections officer shoved him headfirst into a jail cell structure. Kevin Grasha, Cincinnati.com, "Hamilton County will pay $500,000 to man seriously injured by jail officer," 11 May 2018 Biking, hiking, the summer softball league, and going headfirst down the nearest waterslide. Catherine Urban, Bon Appetit, "It’s Barbecue Season, So Your June Horoscope Comes with a BBQ Side for Every Sign," 1 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'headfirst.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of headfirst

1790, in the meaning defined at sense 1

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Time Traveler for headfirst

The first known use of headfirst was in 1790

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More Definitions for headfirst



English Language Learners Definition of headfirst

: with the head leading

: without taking time to think about your actions


head·​first | \ˈhed-ˈfərst \

Kids Definition of headfirst

: with the head in front He fell headfirst down the stairs.

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Comments on headfirst

What made you want to look up headfirst? Please tell us where you read or heard it (including the quote, if possible).


something that serves to warn or remind

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