- (a.&adv.) Hastily; without delay or respite.
- (a.) Steep; precipitous.
- (a.&adv.) Rashly; precipitately; without deliberation.
- (a.) Rash; precipitate; as, headlong folly.
- (a.&adv.) With the head foremost; as, to fall headlong.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Headlong. Retrieved September 21, 2026, from http://smartdefine.org/headlong/definitions/2015384 |
| Chicago | Webster's. 2011. "Headlong" http://smartdefine.org/headlong/definitions/2015384 (accessed September 21, 2026). |
| Harvard | Webster's 2011, Headlong, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/headlong/definitions/2015384>. |
| MLA | Webster's. "Headlong" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/headlong/definitions/2015384> |