|1.||[ adverb ] with the head foremost|
"the runner slid headlong into third base"
|2.||[ adjective ] excessively quick|
"made a hasty exit" "a headlong rush to sell"
|3.||[ adverb ] in a hasty and foolhardy manner|
"he fell headlong in love with his cousin"
|Related terms:||rash rash|
|4.||[ adverb ] at breakneck speed|
"burst headlong through the gate"
|Related terms:||hasty hasty hasty hasty|
|5.||[ adjective ] with the head foremost|
"a headfirst plunge down the stairs" "a headlong dive into the pool"