A pioneer is someone who is first at doing something, or someone who is among a group of such people.

• Pioneer settlers founded colonies in the New World, most notably in the American Old West. They are stock characters in Western movies, often depicted driving covered wagons in wagon trains on the Midwest's Great Plains.
  • The Mormon Pioneers were the members of the Church of Jesus Christ of Latter-day Saints who crossed the Great Plains.
• Pioneers were members of socialist youth movements.
  • Pioneer Island is part of the Severnaya Zemlya archipelago in the Kara Sea, north of Russia
• In the military, a pioneer is similar to a combat engineer.
• In Ireland, a Pioneer is a member of the Pioneer Total Abstinence Association.
• The Pioneer program is a series of space probes from NASA's Jet Propulsion Laboratory
  • Pioneer is the name of the first probe from this program.
• Pioneer is a Japanese company that produces consumer electronics, notably car stereos.
• Pioneer is a robot developed in China.