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Meaning of operating

op•er•at•ing

Pronunciation: (op'u-rā"ting), [key]
— adj.
  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. 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.
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