headlong

1 of 2

adverb

head·​long ˈhed-ˈlȯŋ 

1

: headfirst sense 1

dove headlong to the ground

2

: without deliberation : recklessly

rushes headlong into danger

3

: without pause or delay

ran headlong to the door

headlong

2 of 2

adjective

head·​long ˈhed-ˌlȯŋ 

1

archaic : steep, precipitous

2

: lacking in calmness or restraint : precipitate

a headlong torrent of emotion

3

: plunging headfirst

a headlong fall from the cliff

Did you know?

Headlong was born out of the Middle English word hedling, a combination of hed ("head") and -ling, an adverb suffix meaning "in such a direction or manner." Thus, hedling meant "with the head first”; it was originally applied to descriptions of falling, or to downward movement. Likely due to the influence of the words along and long, -ling came to be understood as a variant of the adverb suffix -long, a development that carried headlong, as well as sidelong, along with it.

Synonyms of headlong

Adverb

• hastily
• hurriedly
• impulsively
• precipitately

Adjective

• hurried
• rushed
• impulsive
• reckless
• precipitous
• sudden
• hasty
• rash
• overhasty

Choose the Right Synonym for headlong

precipitate, headlong, abrupt, impetuous, sudden mean showing undue haste or unexpectedness.

precipitate stresses lack of due deliberation and implies prematureness of action.

the army's precipitate withdrawal

headlong stresses rashness and lack of forethought.

a headlong flight from arrest

abrupt stresses curtness and a lack of warning or ceremony.

an abrupt refusal

impetuous stresses extreme impatience or impulsiveness.

an impetuous lover proposing marriage

sudden stresses unexpectedness and sharpness or violence of action.

flew into a sudden rage

Examples of headlong in a Sentence

Adverb

I dove headlong to the floor.

plunged headlong into the crowd in pursuit of the purse snatcher

Adjective

terrified forest creatures in a headlong retreat from the rapidly spreading fire

Recent Examples on the Web

Adverb

The need for separate facilities ran headlong into the overwhelming demand for building materials to advance the war effort. —Time, 5 Nov. 2025

Forces of good and evil collide in a terrifying film where real-world challenges crash headlong into other worldly creatures and myths. —Justin Kroll, Deadline, 31 Oct. 2025

Adjective

The study, conceived by Karen Froud and published last year, was the first of its kind and should have jolted policymakers and publishers alike into questioning the headlong rush away from print, even as reading scores continue to plummet nationwide. —John R. MacArthur, Air Mail, 8 Nov. 2025

At Houlihan Lokey, Swain persists in the headlong roundelay of networking that’s his calling card. —Shawn Tully, Fortune, 1 Nov. 2025

Word History

Etymology

Adverb

Middle English hedlong, alteration of hedling, from hed head

First Known Use

Adverb

14th century, in the meaning defined at sense 1

Adjective

circa 1533, in the meaning defined at sense 1

Rhymes for headlong

• agung
• along
• belong
• birdsong
• furlong
• headstrong
• lifelong
• plainsong
• prolong
• sarong
• tanjong
• weeklong

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Kids Definition

headlong

1 of 2 adverb

head·​long ˈhed-ˈlȯŋ 

1

: headfirst

2

: without careful thought : recklessly

headlong

2 of 2 adjective

1

: lacking in calmness or restraint : rash

headlong flight

2

: plunging headfirst

a headlong dive