first base

English

(singular only, baseball) The base after home plate in a counter-clockwise path around a baseball infield.
The runner took his lead off first base.
(singular only, by extension) Completion of the first phase of an activity.
(singular only, US, colloquial) Kissing, regarded as the first phase of a sexual relationship.
(blackjack) The betting spot located immediately to the left of the dealer, which is first to receive cards and first to act.

baseball: base after home plate