first base

American  

noun

1. Baseball.

   1. the first in counterclockwise order of the bases from home plate.

   2. the position of the player covering the area of the infield near first base.

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idioms

1. get to first base,

   1. to succeed in the initial phase of a plan or undertaking.

      His suggestions for labor-saving techniques never got to first base.

   2. to engage in petting that goes no further than kissing.

first base British  

noun

1. baseball

   1. 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

   2. the fielding position nearest this base

2. informal to accomplish the first step of an undertaking

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Etymology

Origin of first base

An Americanism dating back to 1835–45

Example Sentences

Third baseman Ezra Sutton hit a dribbler to pitcher Joe Borden, who threw to first base for the out.

From The Wall Street Journal • Apr. 21, 2026

Ohtani also stole his first base of the season.

From Los Angeles Times • Apr. 20, 2026

He could have been home with his five kids, and instead he was rushing off the mound to take a throw at first base.

From Los Angeles Times • Mar. 2, 2026

Not everyone is born on first base with the advantages of someone with family wealth and/or the means to pursue education and a high-paying career.

From MarketWatch • Dec. 18, 2025

I played a respectable first base and didn't lead the League in anything.

From "Will Grayson, Will Grayson" by John Green and David Levithan