- (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 20, 2026, from http://smartdefine.org/headlong/definitions/2015384 |
| Chicago | Webster's. 2011. "headlong" http://smartdefine.org/headlong/definitions/2015384 (accessed September 20, 2026). |
| Harvard | Webster's 2011, headlong, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/headlong/definitions/2015384>. |
| MLA | Webster's. "headlong" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/headlong/definitions/2015384> |