first base
Americannoun
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first bases
plural
idioms
noun
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baseball
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the base that a runner must reach safely to score a hit, and the first of the three bases he must reach safely on the way to home plate in order to score a run
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the fielding position nearest this base
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informal to accomplish the first step of an undertaking
Other Word Forms
Noun Inflected Forms
Etymology
Origin of first base
An Americanism dating back to 1835–45
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Samantha dropped the bat and sprinted toward first base.
From Los Angeles Times ● Sep. 29, 2026
He is absurdly fast, sprinting from the left-handed batter’s box to first base in just 3.96 seconds, better than anybody else in MLB.
From The Wall Street Journal ● Sep. 24, 2026
Arraez came up as a second baseman, but over time, his poor performance there shifted him over to the less-demanding first base position.
From The Wall Street Journal ● Aug. 5, 2026
But he said he recalled players from visiting teams hammering a long ball and passing him at first base, thinking “they had a home run, and then making a right turn back to the dugout.”
From Los Angeles Times ● Jun. 18, 2026
“How about we make third base the part of the fence with the gate? And first base is only the right side of the tree,” I suggest.
From "Zara’s Rules for Record-Breaking Fun" by Hena Khan
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.