po.

Baseball.

put-out; put-outs.

* * *

abbrev

Pole

* * *

po.,

Baseball. putout or putouts.

p.o.,

1. post office.

2. Baseball. putout or putouts.

Po (no period),

polonium (chemical element).

P.O.,

1. Peninsular and Oriental (Steam Navigation Company).

2. petty officer.

3. pilot officer (in the Royal Air Force).

4. postal order.

5. post office.