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

Brett Baty is also adding some clubs to his bag by learning first base and outfield, in addition to his duties at third base and second base. —Abbey Mastracco, New York Daily News, 22 Feb. 2026

Kyle Karros has the potential to be a Gold Glove defender at third base for a long time. —Patrick Saunders, Denver Post, 21 Feb. 2026

There were some understandable growing pains when Devers picked up first base upon joining the Giants after a career at third base. —Justice Delos Santos, Mercury News, 18 Feb. 2026

With Alex Bregman now a member of the Cubs, Matt Shaw is making the transition from playing almost exclusively at third base to being a utility guy who will play in the outfield as well. —Matt Zahn, CBS News, 17 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