| STO | absolutely still |
|---|---|
| STO | without moving or making a sound |
| STO | a penal camp where political prisoners or prisoners of war are confined (usually under harsh conditions) |
| STO | fortification consisting of a fence made of a line of stout posts set firmly for defense |
| STO | surround with a stockade in order to fortify |
| STO | an agent in the buying and selling of stocks and bonds |
| STO | (British) a wealthy residential suburb |
| STO | boxcar with latticed sides |
| STO | furnished with more than enough |
| STO | furnished with more than enough |
| STO | a domestic animal (especially a young steer or heifer) kept as stock until fattened or matured and suitable for a breeding establishment |
| STO | fish cured by being split and air-dried without salt |