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 Chanticleers notched only one hit against him — a ground ball that bounced over Becerra’s head at third base. —David Eckert, Austin American Statesman, 28 Feb. 2026

Both Durbin and Mayer primarily played third base in 2025 at the big league level, though both are capable defenders all over the infield. —Mac Cerullo, Boston Herald, 27 Feb. 2026

Song has only worked at second and third base for the Padres, but shortstop and outfield work appear to be imminent. —Jeff Sanders, San Diego Union-Tribune, 27 Feb. 2026

The Rangers played utility infielder Ezequiel Duran at third base Thursday with Josh Jung out because of hamstring discomfort. —Shawn McFarland, Dallas Morning News, 26 Feb. 2026

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