COO Views 18 meanings found COO most often refers to the Chief Operating Officer, the senior executive responsible for managing a company's day‑to‑day operations, though in academic and financial discussions it can also denote cost of ownership. Miscellaneous Consideration Of Others Conspiracy Of One Country Of Origin Chief Operations Officer Community Committee Of One Governmental Chief Of Overt Operations Chief Ordnance Officer Council of Organizations International Centro Oftamologico de Occidente Academic & Science Cost Of Ownership Regional Cotonou, Benin Computing Cookie file Business Chief Operating Officer Cooper Companies, Inc. Coolabi Cosmos Ltd Chief Operation Officer Chief Operative Officer