Webster's Revised Unabridged Dictionary · 1913

Ahead

Ahead ({not transcribed}) , adverb

[Prefix a- + head.]

1.
In or to the front; in advance; onward.
The island bore but a little ahead of us. — Fielding
2.
Headlong; without restraint. [Obsolete] — L'Estrange
Collocations (2)
To go ahead , (a) To go in advance. (b) To go on onward. (c) To push on in an enterprise. [Colloquial]
To get ahead of , (a) To get in advance of. (b) To surpass; to get the better of. [Colloquial]