pioneer

American  

[pahy-uh-neer] / ˌpaɪ əˈnɪər /

noun

1. a person who is among those who first enter or settle a region, thus opening it for occupation and development by others.

2. a person, group, or thing that is first or among the earliest in any field of inquiry, enterprise, or development.

   a woman who was a pioneer in cancer research;

   vehicles that were pioneers of automotive engineering.

   Synonyms:

   innovator, groundbreaker, trailblazer, leader

3. one of a group of foot soldiers detailed to make roads, dig intrenchments, etc., in advance of the main body.

4. Ecology. an organism that successfully establishes itself in a barren area, thus starting an ecological cycle of life.

5. Aerospace. Pioneer, one of a series of U.S. space probes that explored the solar system and transmitted scientific information to earth.

6. Pioneer, (formerly) a member of a Communist organization in the Soviet Union for children ranging in age from 10 to 16.

---

verb (used without object)

1. to act as a pioneer.

verb (used with object)

1. to be the first to open or prepare (a way, settlement, etc.).

2. to take part in the beginnings of; initiate.

   to pioneer an aid program.

3. to lead the way for (a group); trailblaze.

adjective

1. being the earliest, original, first of a particular kind, etc..

   a pioneer method of adult education.

2. of, relating to, or characteristic of pioneers.

   pioneer justice.

3. being a pioneer.

   a pioneer fur trader.

pioneer ¹ British  

/ ˌpaɪəˈnɪə /

noun

1. 1. a colonist, explorer, or settler of a new land, region, etc

   2. ( as modifier )

      a pioneer wagon

2. an innovator or developer of something new

3. military a member of an infantry group that digs entrenchments, makes roads, etc

4. ecology the first species of plant or animal to colonize an area of bare ground

---

verb

1. to be a pioneer (in or of)

2. (tr) to initiate, prepare, or open up

   to pioneer a medical programme

Pioneer ² British  

/ ˌpaɪəˈnɪə /

noun

1. a total abstainer from alcoholic drink, esp a member of the Pioneer Total Abstinence Association, a society devoted to abstention

---

Pioneer ³ British  

/ ˌpaɪəˈnɪə /

noun

1. any of a series of US spacecraft that studied the solar system, esp Pioneer 10, which made the first flyby of Jupiter (1973), and Pioneer 11, which made the first flyby of Saturn (1979)

---

Etymology

Origin of pioneer

First recorded in 1515–25; from Middle French pionier, Old French peonier “foot soldier”; peon ¹, -eer

Example Sentences

And belying urban legends, there was no link to the Biblical story of Adam and Eve or the death of computing pioneer Alan Turing.

From Barron's • Mar. 29, 2026

He was a pioneer in the manufacturing and marketing of cheerleading apparel and equipment and also played a role in establishing safety guidelines for the sport.

From Los Angeles Times • Mar. 25, 2026

Most of the fossil material was originally collected in 1986 by Dr. Mary Dawson, Curator Emeritus at Carnegie Museum of Natural History in Pittsburgh, Pennsylvania and a pioneer in Arctic paleontology.

From Science Daily • Mar. 24, 2026

Now, low-frills flying pioneer Southwest Airlines LUV -3.57%decrease; red down pointing triangle , and low-cost carriers like Spirit and Frontier are adding seats that give passengers perks like a few extra inches of leg space.

From The Wall Street Journal • Mar. 23, 2026

Like now: he was imagining that he was a pioneer, the first person ever to hike this hill.

From "Ruby Holler" by Sharon Creech