Definitions
1.nounOne who goes before, as into the wilderness, preparing the way for others to follow.
2.nounA person or other entity who is first or among the earliest in any field of inquiry, enterprise, or progress."Certain politicians can be considered as pioneers of reform."
3.nounA soldier detailed or employed to form roads, dig trenches, and make bridges, as an army advances; a sapper.
4.nounA member of any of several European organizations advocating abstinence from alcohol.
5.nounA child of 10–16 years in the former Soviet Union, in the second of the three stages in becoming a member of the Communist Party.
6.verbTo be the first to do or achieve (something), preparing the way for others to follow."The young doctor pioneered a new life-saving surgical technique."