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first base definition

☆ first base

  1. the base to the left of the pitcher, the first of the four bases that a base runner attempts to reach safely
  2. the defensive position played by the first baseman
first base Idioms

get to first base

Slang
to accomplish the first step of an undertaking, often, specif., a romantic or sexual one

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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