spearhead UK /ˈspɪə.hɛd/US /ˈspɪɹ.hɛd/noun 4verb 1forms 3 noun4 •The pointed head, or end, of a spear. •Something or somebody leading or initiating an activity (such as an attack or campaign).Spearheads of the NER bargain fares attack this year have been the introduction of weekend fares at a 7s 6d in the £ discount on ordinary rates between principal stations throughout the Region—[...]. — 1964 •The leading military unit in an attack. •A player who initiates attacking moves.England played at a tempo in attack that was too much for Bulgaria, with width provided at various times by Walcott, Young and Stewart Downing and Rooney acting as the potent spearhead. — 2011 verb1 •To drive or campaign ardently for (an effort, project, etc.); to direct.He spearheaded the entire project from day one. formsspearheaded · spearheading · spearheads