On deck

Waiting to take one's turn (especially as a batter in baseball).The player was on deck and waiting for his turn at bat.

On deck

On the deck of a boat or a ship.When we were on the boat we spent most of the time on deck.

On credit

Buying or selling something by using credit.I purchased the stereo on credit.

On consignment

Being sold in a store but owned by someone who is trying to sell the item in the store.We went to the store to buy some baby furniture that was... Read more →

On cloud nine

Very happy.The woman has been on cloud nine since she decided to get married.

On campus

On the grounds of a college or university.We often go to a small coffee shop on campus after our classes.

On call

Available to be called to go to work.The man's job is to repair computers and he is always on call.

On board

To be on a ship or airplane or train or similar form of transportation.We got on board the airplane just before they closed the doors.

On bended knee

With great humility.The young man was on bended knee when he asked his girlfriend to marry him.

On behalf of (someone)

Representing someone.The lawyer went to the meeting on behalf of his client.