1.
If you move ~ in a particular direction, you move there very quickly.
He ran ~ for the open door.
ADV: ADV after v
2.
If you fall or move ~, you fall or move with your head furthest forward.
She missed her footing and fell ~ down the stairs.
ADV: ADV after v
3.
If you rush ~ into something, you do it quickly without thinking carefully about it.
Do not leap ~ into decisions...
ADV: ADV after v
•
Headlong is also an adjective.
...the ~ rush to independence.
ADJ: ADJ n