Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Old French
Origin: peonier 'soldier', from peon, from Medieval Latin pedo; PAWN1

pioneer

1 noun
     
pi‧o‧neer1 [countable]
1 someone who is important in the early development of something, and whose work or ideas are later developed by other people
pioneer of
John Whitney was a pioneer of computer animation.
He was a pioneer in the field of biotechnology.
2 one of the first people to travel to a new country or area and begin living there, farming etc:
the early pioneers of the Dakota territory
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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