Overview of adj headfirst

The adj headfirst has 1 sense

• headfirst, headlong -- (with the head foremost; "a headfirst plunge down the stairs"; "a headlong dive into the pool")

Overview of adv headfirst

The adv headfirst has 1 sense

• headlong, headfirst -- (with the head foremost; "the runner slid headlong into third base")