first base

noun

Synonyms of first basenext
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.
The first base position is one that Nightengale gives two options for. Drew Vonscio, MSNBC Newsweek, 11 Dec. 2025 Devers and Eldridge are both learning the intricacies of first base. Justice Delos Santos, Mercury News, 4 Dec. 2025 Trading Contreras would open up first base full-time for Alec Burleson and could alleviate some payroll concerns. Katie Woo, New York Times, 2 Dec. 2025 According to a source, the Marlins also believe outfielder Heriberto Hernandez could play first base. Barry Jackson, Miami Herald, 2 Dec. 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 16 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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