adv
headfirst
Headfirst (adv) means With the head leading; headlong. Example: “He dove headfirst into the pool.”
adv
1
With the head leading; headlong.
"He dove headfirst into the pool."
2
Rashly, without careful thought.
"Sheffield was not going to stop being Sheffield just because he had dived headfirst into the lusts of the flesh."
— Kerry Greenwood, Murder and Mendelssohn (2016)
"She jumped headfirst into the new job without checking the details."
"Over the past two years, Silicon Valley’s leaders and investors — many of whom had once forsworn involvement in weapons and war — have plunged headfirst into the military industrial complex."
— Sheera Frenkel, The Militarization of Silicon Valley (2025)
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He dove _____ into the pool.
Etymology
A compound of "head" and "first."
Synonyms
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Frequently asked questions
What does “headfirst” mean?
The word “headfirst” means with the head leading; headlong.
How do you use “headfirst” in a sentence?
Here is “headfirst” used in a sentence: “He dove headfirst into the pool.”
What part of speech is “headfirst”?
“Headfirst” is an adverb.
How many meanings does “headfirst” have?
“Headfirst” has 2 distinct senses listed in this dictionary. The most common is: with the head leading; headlong.
