Refers to the implement used in baseball, cricket, and similar sports. The animal 'bat' is コウモリ.
He hit a home run with his new bat.
バットをしっかり握って構える。
Grip the bat firmly and take your stance.
He swung the bat with all his might.
He hit the ball with the bat.
The batter readied his bat and watched the pitcher.
fungo bat