adj steep; precipitous.
2. headlong ·adj rash; precipitate; as, headlong folly.
3. headlong ·adj & ·adv hastily; without delay or respite.
4. headlong ·adj & ·adv rashly; precipitately; without deliberation.
5. headlong ·adj & ·adv with the head foremost; as, to fall headlong.