Someone who leads or initiates an activity (attack or campaign etc.)

Usage examples of spearhead.

Flip raising her hand and getting an assistant, Flip spearheading the antismoking campaign that had made me suggest the paddock to Shirl, who had told us about the bellwether.

Fed on scraps of gristle, isolated from his kind, beaten when he failed to make his daily quota of spearheads and arrowpoints, he had shyly retreated into beautifully interminable labyrinths of abstraction.

She thought of the man called Kennedy who forged spearheads and arrowpoints for her peoplehe was a strange one, touched by the goddess, which proved her infinite power.

The sudden brightness gleamed off spearheads, axheads, swordguards, shield bosses, where weapons rested near the entry.

Her targe beat aside a spearhead, and then the backsword flicked out in a blurring thrust.

Centuries ago the boys who found the cave realized that if they chose as their hero a skeleton with a spearhead inside the crushed rib cage, it would be a hero who had somehow failed.

CD inspectors will see the spearhead of the Republican army destroyed by nukes, and think the Dons did it.

The Rebels spread out, with tanks spearheading, and began hammering their way south.

The mighty machine of war called the Rebels surged forward at first light, pushing hard behind the spearheading tanks.

The Rebels, with armor spearheading, smashed more than two miles into punk territory that first day, from two directions: the north and the east.

Germany had nearly a quarter million men on the southern front, spearheaded by a thousand tanks and self-propelled assault guns, thirty-five hundred artillery pieces and mortars.

The thundercracks echoed across the fields towards the wood, and before the sound of the last died the Hyerne were charging at a bounding run through the waist-high wheat, plumes nodding, whetted spearheads glinting, cocked back over their right shoulders.

Tifari Amu and his comrade Bizan lounged before their tent, whetting their spearheads and conversing.

But during the last couple of decades theoretical progress spearheaded by the late Irish physicist John Bell and the experimental results of Alain Aspect and his collaborators have shown convincingly that Einstein was wrong.

Now, though, as we near the millennium, we have a new breed of feminist gumshoes, spearheaded by Sharon McCone, V.