Webster's Revised Unabridged Dictionary · 1913

Driver

Driver , noun

[From Drive.]

1.
One who, or that which, drives; the person or thing that urges or compels anything else to move onward.
2.
The person who drives beasts or a carriage; a coachman; a charioteer, etc.; hence, also, one who controls the movements of a any vehicle.
3.
An overseer of a gang of slaves or gang of convicts at their work.
4.
(Machinery) A part that transmits motion to another part by contact with it, or through an intermediate relatively movable part, as a gear which drives another, or a lever which moves another through a link, etc. Specifically:
(a)
The driving wheel of a locomotive.
(b)
An attachment to a lathe, spindle, or face plate to turn a carrier.
(c)
A crossbar on a grinding mill spindle to drive the upper stone.
5.
(Nautical) The after sail in a ship or bark, being a fore-and-aft sail attached to a gaff; a spanker. — Totten
6.
An implement used for driving;
(a)
A mallet.
(b)
A tamping iron.
(c)
A cooper's hammer for driving on barrel hoops.
(d)
A wooden-headed golf club with a long shaft, for playing the longest strokes.
Collocations (1)
Driver ant (Zoology) , a species of African stinging ant; one of the visiting ants (Anomma arcens); -- so called because they move about in vast armies, and drive away or devour all insects and other small animals.