third base

noun

1

: the base that must be touched third by a base runner in baseball

2

: the player position for defending the area around third base

third baseman noun

Examples of third base in a Sentence

a runner on third base

Recent Examples on the Web

The 25-year-old southpaw who plays first and third base hit 256 career homers in Japan, but strikes out a lot. —Cbs Chicago Team, CBS News, 22 Dec. 2025

Bregman would play third base for the DBacks, with Jordan Lawlar, Blaze Alexander and Tim Tawa becoming options at second. —Ken Rosenthal, New York Times, 17 Dec. 2025

In comes Sarandos, who has defied the odds at every turn with his upstart streaming company, and Ellison, born on third base with a fierce determination to be a mogul. —Steven Zeitchik, HollywoodReporter, 12 Dec. 2025

The Red Sox would benefit greatly from adding him at second base while Marcelo Mayer slides over to third base. —Zach Pressnell, MSNBC Newsweek, 11 Dec. 2025

Word History

First Known Use

1845, in the meaning defined at sense 1

Rhymes for third base

• abase
• airspace
• apace
• backspace
• biface
• birthplace
• blackface
• boldface
• bookcase
• braincase
• briefcase
• carcase

Kids Definition

third base

noun

: the base that must be touched third by a base runner in baseball or the position of the player defending the area around it