headfirst

[ hed-furst ]
/ ˈhɛdˈfɜrst /

adverb

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

Examples from the Web for headfirst

British Dictionary definitions for headfirst

headfirst
/ (ˈhɛdˈfɜːst) /

adjective, adverb

with the head foremost; headlonghe fell headfirst

adverb

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