1. the expense of maintaining property (e.g., paying property taxes and utilities and insurance); it does not include depreciation or the cost of financing or income taxes
2. (computer science) the processing time required by a device prior to the execution of a command
3. (computer science) the disk space required for non-data information (used for location and timing)
4. a transparency for use with an overhead projector
5. (nautical) the top surface of an enclosed space on a ship
6. a hard return hitting the tennis ball above your head