Hypertext Webster Gateway: "headfirst"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Headfirst \Head`first"\, Headforemost \Head`fore"most`\, adv.
With the head foremost.
From WordNet (r) 1.7 (wn)
headfirst
adj : with the head foremost; "a headfirst plunge down the
stairs"; "a headlong dive into the pool" [syn: {headlong}]
adv : with the head foremost; "the runner slid headlong into third
base" [syn: {headlong}]
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