Definitions for: Headfirst

[adv] with the head foremost; "the runner slid headlong into third base"
[adj] with the head foremost; "a headfirst plunge down the stairs"; "a headlong dive into the pool"

Webster (1913) Definition: Head`first", Headforemost Head`fore"most`, adv.
With the head foremost.

Synonyms: forward, headlong, headlong