forerunner
noun
[ ˈfɔːrʌnə ]
• a person or thing that precedes the coming or development of someone or something else.
• "the ice safe was a forerunner of today's refrigerator"
• a sign or warning of something to come.
• "overcast mornings are the sure forerunners of steady rain"
Similar:
herald,
harbinger,
usher,
advance guard,
precursor,
prelude,
sign,
signal,
warning,
token,
portent,
omen,
augury,
