first base

(noun) the base that must be touched first by a base runner in baseball. Synonyms: first base.

(noun) the fielding position of the player on a baseball team who is stationed at first of the bases in the infield (counting counterclockwise from home plate). Synonyms: first base, first.

(noun) the initial stage in accomplishing something. Synonyms: first base. Example: "We didn't get to first base with that approach."