pioneer

(pīˌə-nîrˈ)

1. One who ventures into unknown or unclaimed territory to settle.
2. One who opens up new areas of thought, research, or development: a pioneer in aviation.
3. A soldier who performs construction and demolition work in the field to facilitate troop movements.
4. Ecology An animal or plant species that establishes itself in a previously barren environment.

1. Of, relating to, or characteristic of early settlers: the pioneer spirit.
2. Leading the way; trailblazing: a pioneer treatment for cancer.

1. a. To open up (an area) or prepare (a way): rockets that pioneered outer space.
   b. To settle (a region).
2. To initiate or participate in the development of: surgeons who pioneered organ transplants.