What is the meaning of Lead_off?

The first batter in the batting order.

The first batter of an inning.

The short distance that a player stands away from their current base.

Used other than figuratively or idiomatically: see lead, off.

To be the first batter of an inning.

To be the first of any set, especially the first person in a group to speak; to launch or begin something by speaking.

Source: wiktionary.org