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English definition of “spearhead”

spearhead

verb [T] uk   /ˈspɪə.hed/ us    /ˈspɪr-/
to lead something such as an attack or a course of action: British troops spearheaded the invasion. Joe Walker will be spearheading our new marketing initiative.

spearhead

noun [C usually singular] uk   /ˈspɪə.hed/ us    /ˈspɪr-/
a person or group that leads something such as an attack or a course of action: American troops formed the spearhead of the attack.
(Definition of spearhead from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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