#1 forerunner n. [precursor] a person who goes before or announces the coming of another. wn
#2 forerunner n. [harbinger, predecessor, herald, precursor] something that precedes and indicates the approach of something or someone. wn
#3 forerunner n. [antecedent] anything that precedes something similar in time; "phrenology was an antecedent of modern neuroscience". wn
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