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Definitions

headlong

[hed-lawng, -long] / ˈhɛdˌlɔŋ, -ˌlɒŋ /
ADJECTIVE
dangerous, reckless
Synonyms
STRONGEST
breakneck hurried sudden
WEAK
abrupt brash daredevil daring foolhardy hasty impetuous impulsive inconsiderate precipitant precipitate rash rough rushing tempestuous thoughtless
Antonyms
STRONGEST
slow
WEAK
careful cautious thoughtfully wary

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But the audaciousness is always in service of capturing the headlong rush of new love, the characters as giddy as the filmmaking.

From Los Angeles Times • Dec. 12, 2025

There was “a headlong stampede to protectionism and restriction in imports,” in the words of economic historian Charles Kindleberger.

From The Wall Street Journal • Dec. 8, 2025

Saturday's Anfield horror show at the hands of Nottingham Forest was a headlong fall into the abyss.

From BBC • Nov. 22, 2025

Both Liberty Energy and ProPetro, best known for their expertise in hydraulic fracturing, or fracking, have jumped headlong into the data- center game.

From Barron's • Nov. 13, 2025

The war had been a freight train, traveling headlong at top speed.

From "Hidden Figures" by Margot Lee Shetterly

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.