on board - to be on a ship/plane or similar form of transportation We got on board the airplane just before they closed the doors. on call - to be available to be called to go to work His job is to repair computers and he is always on call. on campus - to be on the grounds of a college or university We often go to a small coffee shop on campus after our classes. on cloud nine - to be very happy She has been on cloud nine since she decided to get married last month. on consignment - being sold in a store by someone who.
