o/d

1. The act of overdrawing a bank account.

2. Abbr. OD or o/d The amount overdrawn.

3. The maximum amount of credit extended to a customer.

4. A current of air made to pass over the ignited fuel in a furnace.

5. A series of flues in a brick kiln designed to force air down from the top.

6. The air so forced.

also o·ver·draught (-drāft')

1. A current of air made to pass over the ignited fuel in a furnace.

2. A series of flues in a brick kiln designed to force air down from the top.

3. The air so forced.