first base

Noun first base has 3 senses

• first base(n = noun.artifact) Array - the base that must be touched first by a base runner in baseball; Array
is a kind of bag, base

• first base(n = noun.act) first - 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); Array
is a kind of position
is a member of baseball team

• first base(n = noun.act) Array - the initial stage in accomplishing something; "we didn't get to first base with that approach"
is a kind of first step, initiative, opening, opening move