Dictionary.net

one the first colonists or settler in a new territory; "they went west as pioneers with only the possessions they could carry with them"

open up and explore a new area; "pioneer space"

one the first colonists or settler in a new territory; "they went west as pioneers with only the possessions they could carry with them"

A soldier detailed or employed to form roads, dig trenches, and make bridges, as an army advances.

One who goes before, as into the wilderness, preparing the way for others to follow; as, pioneers of civilization; pioneers of reform.

To go before, and prepare or open a way for; to act as pioneer.

A soldier detailed or employed to form roads, dig trenches, and make bridges, as an army advances.

One who goes before, as into the wilderness, preparing the way for others to follow; as, pioneers of civilization; pioneers of reform.

To go before, and prepare or open a way for; to act as pioneer.

One who goes before to prepare the way for another, as a settler in a frontier country; a soldier in an engineer corps whose special work is road building and repairing.

A soldier who clears the road before an army, sinks mines, etc.: one who goes before to prepare the way.

To act as pioneer to.

To act as pioneer to.

A soldier whose business is to go before an army to clear obstructions, throw up entrenchments, &c.; one who goes before to prepare the way.

To take the lead in; be a pioneer.

One who prepares the way, as a soldier in advance of an army.

One of a company of soldiers trained to work with pickaxe, spade, &c., and employed in the field to clear the road before an army, throw up works, &c.; one who goes before to prepare the way for another.

To clear the way for.

n. [French] One who marches with or before an army to repair the road or clear it of obstructions, & c.;—one who goes before to remove obstructions or prepare the way for another; hence, a backwoodsman; a first settler.