#1 pioneer v. [open up] open up an area or prepare a way; "She pioneered a graduate program for women students". wn
#2 pioneer n. [innovator, trailblazer, groundbreaker] someone who helps to open up a new line of research or technology or art. wn
#3 pioneer n. one the first colonists or settlers in a new territory; "they went west as pioneers with only the possessions they could carry with them". wn
#4 pioneer v. [initiate] take the lead or initiative in; participate in the development of; "This South African surgeon pioneered heart transplants". wn
#5 pioneer v. open up and explore a new area; "pioneer space". wn
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