- 1with the head first and the rest of the body following synonym head first She fell headlong into the icy pool.
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- 2without thinking carefully before doing something The government is taking care not to rush headlong into another controversy.
- 3quickly and without looking where you are going He ran headlong into a police car.
a headlong dive/rushSee headlong in the Oxford Advanced Learner's Dictionary
Check pronunciation: headlong