"overhead" in the noun sense
1. operating expense, operating cost, overhead, budget items
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. 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
3. disk overhead, overhead
computer science) the disk space required for information that is not data but is used for location and timing
4. viewgraph, overhead
a transparency for use with an overhead projector
5. overhead
nautical) the top surface of an enclosed space on a ship
6. overhead, smash
a hard return hitting the tennis ball above your head
"overhead" in the adjective sense
1. overhead
located or originating from above
"an overhead crossing"
"overhead" in the adverb sense
1. overhead
above your head in the sky
"planes were flying overhead"
2. overhead
above the head over the head
"bring the legs together overhead"
Source: WordNet® (An amazing lexical database of English)
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