First-base definition

(slang) The first stage or step toward completion or success.
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The first of the bases in the infield, counterclockwise from home plate.
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The fielding position occupied by the first baseman.
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The base to the left of the pitcher, the first of the four bases that a base runner attempts to reach safely.
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The defensive position played by the first baseman.
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(singular only, baseball) The base after home plate in a counter-clockwise path around a baseball infield.

The runner took his lead off of first base.

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(singular only, by extension) Completion of the first phase of an activity.
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(singular only, US, colloquial) Kissing.
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(slang) get to first base
  • to accomplish the first step of an undertaking, often, specif., a romantic or sexual one
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Idioms and Phrasal Verbs

First-base Sentence Examples

  • I didn't get to first base but you've got a spiffy uniform and a shiny badge.

  • We recommend that gene sequences be numbered so that the first base of the first codon is numbered zero.

  • Prior to applying any color to the eyelid, use an eye shadow base, such as First Base or Second Base by Too Faced.

  • If they hit the ball, they can walk to first base.

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Words near first-base in the Dictionary