first base

noun

baseball : the base that must be touched first by a base runner; also : the position of the player who defends the area around first base

Full Definition of FIRST BASE

: the base that must be touched first by a base runner in baseball

: the player position for defending the area around first base

: the first step or stage in a course of action <plans never got to first base>

— first base·man \-ˈbā-smən\ noun

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1845

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