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chief executive
chief executive officer
chief justice
chief master sergeant
chief medical officer
chief of naval operations
chief of staff
chief of state
chief operating officer
chief petty officer
chief rabbi
chief technician
chief warrant officer
chief whip
chiefly
chieftain
chiel
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chief operating officer
chief op·er·at·ing of·fi·cer (plural chief op·er·at·ing of·fi·cers)


noun 
Definition:
 
highest executive in business: the executive responsible to the board for day-to-day running of the company
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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