Open English Wordnet
Nouns
(n)operating expense, operating cost, overhead, budget itemsthe 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
(n)command processing overhead time, command processing overhead, command overhead, overhead(computer science) the processing time required by a device prior to the execution of a command
(n)disk overhead, overhead(computer science) the disk space required for information that is not data but is used for location and timing