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first base

noun

1
: the base that must be touched first by a base runner in baseball
2
: the player position for defending the area around first base
3
: the first step or stage in a course of action
plans never got to first base
first baseman noun

Examples of first base in a Sentence

a runner on first base She hit a ground ball to first base. He used to be a catcher, but now he plays first 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.
Knorr has been a bullpen coach, first base coach and catching coordinator, minor league manager and also worked as an adviser in player development. Kevin Acee, San Diego Union-Tribune, 25 Nov. 2025 The Atlanta, Georgia native primarily played first base in the Fall League due to roster construction, but Haines said the organization views him as a primary third baseman. Justice Delos Santos, Mercury News, 25 Nov. 2025 The Red Sox need a slugger at first base after the position was a nightmare this season. Zach Pressnell, MSNBC Newsweek, 24 Nov. 2025 The ownership group also has several limited partners, with some notable names including Red Sox World Series champion Johnny Damon, former MLB outfielder Zach Sorenson and current Toronto Blue Jays first base coach Mark Budzinski. Mac Cerullo, Boston Herald, 18 Nov. 2025 See All Example Sentences for first base

Word History

First Known Use

1848, in the meaning defined at sense 1

Time Traveler
The first known use of first base was in 1848

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Cite this Entry

“First base.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/first%20base. Accessed 1 Dec. 2025.

Kids Definition

first base

noun
: the base that must be touched first by a base runner in baseball
also : the position of the player defending the area around first base

More from Merriam-Webster on first base

Last Updated: - Updated example sentences
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