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.
The Mariners had the bases loaded with two outs in the 11th before Anderson struck out Raleigh to set up Schanuel’s fly ball after a sacrifice bunt from Oswald Peraza moved Frazier to third base. Doug Padilla, Oc Register, 6 Apr. 2026 In Rocker’s final inning, a single, wild throw and error put a runner on third base with no outs. Lawrence Dow, Fort Worth Star-Telegram, 5 Apr. 2026 The lineup Sunday — which was scheduled to be a day game following a late-afternoon Saturday matchup and before the Dodgers head to Toronto for a World Series rematch — included backups in right field, third base and behind the plate. Maddie Lee, Los Angeles Times, 5 Apr. 2026 His single muscled off the end of his bat into left-center field sent Tatis sprinting around third base and sliding across the plate with the go-ahead run. Kevin Acee, San Diego Union-Tribune, 4 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

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Cite this Entry

“Third base.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/third%20base. Accessed 6 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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