First Base- the first of the four stations that must be reached in turn to score a run.
First Baseman- the person whose position on first base.
Second Base- The base across the diamond from home plate, to be touched second by a runner.
Second Baseman- The infielder who is positioned near and to the first-base side of second base.
Third Base- The third of the bases on the diamond counterclockwise from home plate; the last base to be reached by a runner.
Three Baseman- The infielder stationed near third base.
Catcher- a fielder who stands behind home plate and catches pitched balls not hit by the batter.
Outfielder- A player who defends left, center, or right field.
Foul Ball- A batted ball that touches the ground outside of fair territory. Homerun- a hit that enables the batter to run round all four bases, usually by hitting the ball out of the playing area.
Basehit- by which the batter reaches base safely without incurring an error, fielder's choice, or force play.