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Definition of pioneer noun from the Oxford Advanced Learner's Dictionary

pioneer

noun
 
/ˌpaɪəˈnɪə(r)/
 
/ˌpaɪəˈnɪr/
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  1. pioneer (in/of something) a person who is the first to study and develop a particular area of knowledge, culture, etc. that other people then continue to develop synonym trailblazer
    • a pioneer in the field of microsurgery
    • a computer pioneer
    • a pioneer aviator
    • a pioneer design (= one that introduces new ideas, methods, etc.)
    Extra Examples
    • one of the early pioneers in plastic surgery
    • He is known as a pioneer in veterinary surgery.
    • He was one of the pioneers in opening up archaeology to everyone.
    • I was lucky to meet the heart transplant pioneer, Dr Christian Barnard.
    • Modern guitar design owes a lot to the pioneer designs of the forties and fifties.
    • She later became a pioneer of education for women.
    • The school was an early pioneer of the technique.
    Oxford Collocations Dictionaryadjective
    • early
    • true
    pioneer + noun
    • spirit
    preposition
    • pioneer in
    • pioneer of
    See full entry
  2. one of the first people to go to a particular place, especially in order to live and work there
    • Early pioneers settled on both sides of the Maple River.
    • the pioneer spirit
    • The history of our nation isn't just about hardy pioneers and peaceful settlement, it's about violence and dispossession.
    • The space pioneer became the oldest person to go into space at the age of 82.
  3. Word Originearly 16th cent. (as a military term denoting a member of the infantry): from French pionnier ‘foot soldier, pioneer’, Old French paonier, from paon, from Latin pedo, pedon- ‘foot soldier’, from Latin pes, ped- ‘foot’.
See pioneer in the Oxford Advanced American DictionarySee pioneer in the Oxford Learner's Dictionary of Academic English

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