| 1. | with the head foremost; headfirst: to plunge headlong into the water. |
| 2. | without delay; hastily: to plunge headlong into work. |
| 3. | without deliberation; rashly: to rush headlong into battle. |
| 4. | undertaken quickly and suddenly; made precipitately; hasty: a headlong flight. |
| 5. | rash; impetuous: a headlong denunciation. |
| 6. | done or going with the head foremost: a headlong dive into the pool. |
head·long (hěd'lông', -lŏng') adv.
[From Middle English (bi) hedlong, alteration of (bi) hedling : hed, head; see head + -ling, in a specified direction; see -ling2.] |