Dictionary
spear•head
Pronunciation: (spēr'hed"), [key]—
n.
1. the sharp-pointed head that forms the piercing end of a spear.
2. any person, contingent, or force that leads an attack, undertaking, etc.
—
v.t.
to act as a spearhead for:
She spearheaded the drive for new members. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.