first base

first base [countable]
a) DSB the first of the four places in a game of baseball that a player must touch before gaining a point
b) DSB the position of a defending player near this place:
He plays first base for the Red Sox.

get to/reach first base

American English informal
a) to reach the first stage of success in an attempt to achieve something:
You've gotten to first base if you've landed an interview.
b) old-fashioned informal to kiss someone in a sexual way, used especially by young men to talk about the first stage in a sexual relationship

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