explorer

American  

[ik-splawr-er] / ɪkˈsplɔr ər /

noun

1. a person or thing that explores.

2. a person who investigates unknown regions.

   the great explorers of the Renaissance.

3. any instrument used in exploring or sounding a wound, a cavity in a tooth, or the like.

4. Also called Explorer Scout.  (initial capital letter) a person between the ages 14 and 20 who is an active participant in the exploring program sponsored by the Boy Scouts of America.

5. (initial capital letter) one of a long series of U.S. scientific satellites: Explorer 1 (1958) was the first U.S. artificial satellite.

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Explorer ¹ British  

/ ɪkˈsplɔːrə /

noun

1. Brit equivalent: Venture Scout.  a member of the senior branch of the Scouts

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Explorer ² British  

/ ɪkˈsplɔːrə /

noun

1. any of the first series of US satellites. Explorer 1 , launched in 1958, confirmed the existence of intense radiation belts around the earth

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Etymology

Origin of explorer

First recorded in 1675–85; explore + -er ¹

Explanation

An explorer is a person who sets out to discover something by going somewhere unfamiliar. You might think Marco Polo is just a game to play in the pool, but Marco Polo was actually a famous explorer in the 13th century. In ancient Greece, the explorer Pytheas travelled to what is now Great Britain and Germany, and the Chinese explorer Wang Dayuan explored the Indian Ocean and the South China Sea in the second century BCE. More recently, explorers have voyaged to the moon and outer space. Before the late seventeenth century, this kind of adventurer was called an exploratour, from the Latin root explorare, "examine or investigate."

Example Sentences

Her background is particularly eclectic: an engineer by training, she is a seasoned explorer who has worked in extreme environments including Antarctica.

From Barron's • Mar. 25, 2026

A solo explorer can only fight his circumstances, not his co-pilot.

From Los Angeles Times • Mar. 18, 2026

The ambitious gothic Netflix film featured an Arctic explorer ship frozen on the ice, and Frankenstein's horror lab on top of a Victorian water tower.

From BBC • Feb. 22, 2026

The team behind NASA's six-wheeled Mars explorer tested a vision-enabled artificial intelligence system to map a safe route across the Martian surface without relying on human route planners.

From Science Daily • Jan. 31, 2026

“You’d have to be an explorer to find your way around in this fog.”

From "Coraline" by Neil Gaiman