headlong definition by Webster's New World
- with the head first; headfirst
- with uncontrolled speed and force
- recklessly; rashly; impetuously
Origin: Late Middle English hedlong, altered (by associated, association with along) ; from Middle English hedelinge(s) ; from hede, head plush -linge, adv. suffix
- Old Poet. steep; dizzy; precipitous: a headlong height
- with or done with the head first or foremost; headfirst
- moving with uncontrolled speed and force
- reckless; impetuous
headlong definition by American Heritage Dictionary
- With the head leading; headfirst: The runner slid headlong into third base.
- In an impetuous manner; rashly.
- At breakneck speed or with uncontrolled force.
- Done with the head leading; headfirst: a headlong dive.
- Impetuous; rash. See Synonyms at impetuous.
- Uncontrollably forceful or fast.
- Archaic Steep; sheer.
Origin: From Middle English (bi) hedlong, alteration of (bi) hedling : hed, head; see head + -ling, in a specified direction; see -ling2.