spearhead Meaning, Definition & Usage

  1. noun someone who leads or initiates an activity (attack or campaign etc.)
  2. noun the leading military unit in an attack
  3. noun the head and sharpened point of a spear
    spearpoint; spear-point.
  4. verb be the leader of
    • She spearheaded the effort to find a cure for the disease

WordNet

Spear"head` noun
Definitions
  1. The pointed head, or end, of a spear.

Webster 1913