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

Third baseman Austin Riley just watched as the ball died on the lip between grass and dirt in front of his third base position. —Jackson Roberts, MSNBC Newsweek, 2 Sep. 2025

Caleb Durbin, who was acquired from the New York Yankees this offseason in the Devin Williams trade, has settled in at third base for the Brewers. —Daniel R. Epstein, Forbes.com, 2 Sep. 2025

The 28-year-old infielder batted ninth and started at third base for the Pirates, going 0 for 3 with a walk in his team’s 5-2 loss. —Mac Cerullo, Boston Herald, 31 Aug. 2025

Freddie Freeman led off the fourth with a double but ran into a fielder’s choice on Andy Pages’ ground ball to third base. —Bill Plunkett, Oc Register, 31 Aug. 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