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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.

John Keats couldn’t have better described a woman whose love is true, headlong, self-emptying and completely other-directed.

From The Wall Street Journal • Feb. 13, 2026

“It looks like they’re running headlong into a brick wall,” Valatsas said.

From The Wall Street Journal • Jan. 21, 2026

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

I ran headlong into Rufus, and felt him steady me, hold me.

From "Kindred" by Octavia Butler

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