headfirst Meaning, Definition & Usage

  1. adjective satellite with the head foremost
    headlong.
    • a headfirst plunge down the stairs
    • a headlong dive into the pool
  2. adverb with the head foremost
    headlong.
    • the runner slid headlong into third base

WordNet

Head`first", Head`fore"most` adverb (Also<
  • Headfirst
  • Headforemost
)
Definitions
  1. With the head foremost.

Webster 1913