Meaning

noun 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

noun (computer science) the processing time required by a device prior to the execution of a command

noun (computer science) the disk space required for information that is not data but is used for location and timing

originFrom Middle English owerheved, over-hed, over hede (adverb), from Old English oferhēafod (adverb), equivalent to over- + head. Compare German Low German overhoopt, överhoopt, German überhaupt. Piecewise doublet of overchief.

Etymology from Wiktionary, CC BY-SA 3.0