Pronunciation: (op'u-rā"ting), [key]
1. used or engaged in performing operations: an operating surgeon.
2. of, for, or pertaining to operations: an operating budget.
3. of or pertaining to the proper operation of a machine, appliance, etc.: a manual of operating instructions.
4. Railroads.of, pertaining, or belonging to railroad workers, as engineers or firemen, who are directly engaged in the mechanical operation of trains: an operating union.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

operaticoperating income
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