with the head in front or bent forward; headforemost: He dived headfirst into the sea.
rashly; precipitately.

Origin of headfirst

First recorded in 1820–30; head + first
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for headfirst

carelessly, hastily, rashly

Examples from the Web for headfirst

Contemporary Examples of headfirst

Historical Examples of headfirst

  • The men amidship climbed over the side and went in headfirst.

  • Would O'Shea make him drunk, and then cast him headfirst into the swallowing sand?

    The Mermaid

    Lily Dougall

  • And reaching the edge of the swamp, he threw him out into the muddy water, headfirst.

    A Woman at Bay

    Nicholas Carter

  • Serpents strive to turn their prey and swallow it headfirst.

  • Rick waited until the vinta was on the downward slope of the backwash from the shore, then went in headfirst.

    The Pirates of Shan

    Harold Leland Goodwin

British Dictionary definitions for headfirst


adjective, adverb

with the head foremost; headlonghe fell headfirst


rashly or carelessly
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012