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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Marzullo, who plays mostly third base in travel, explained her hitting work. Rick Armstrong, Chicago Tribune, 22 Apr. 2026 Despite the front office’s solid assessment of the Mets’ defense, a team featuring defenders out of place at first base, third base, left field and right field has not played exceptionally clean. Abbey Mastracco, Hartford Courant, 19 Apr. 2026 But Jo Adell grounded out with the tying run at third base. Doug Padilla, Oc Register, 19 Apr. 2026 Jordan Walker then hit a routine chopper to third base, where Brice Matthews had replaced Isaac Paredes two innings earlier as a pinch-runner. Matt Kawahara, Houston Chronicle, 19 Apr. 2026 See All Example Sentences for third base

Word History

First Known Use

1845, in the meaning defined at sense 1

Time Traveler
The first known use of third base was in 1845

Browse Nearby Words

Cite this Entry

“Third base.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/third%20base. Accessed 26 Apr. 2026.

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
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