/spear"hed'/ , 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.
3. to act as a spearhead for: She spearheaded the drive for new members.
[ 1350-1400; ME; see SPEAR 1 , HEAD ]
Syn. 3. lead, start, initiate, pioneer.