2 definitions found From The Collaborative International Dictionary of English v.0.44 [gcide]: O \O\ ([=o]), noun; pl. {O's} or {Oes} ([=o]z). 1. The letter O, or its sound. ''Mouthing out his hollow oes and aes.'' --Tennyson. 2. Something shaped like the letter O; a circle or oval. ''This wooden O [Globe Theater]''. --Shak. 3. A cipher; zero. [R.] Thou art an O without a figure. --Shak. From Virtual Entity of Relevant Acronyms (Version 1.9, June 2002) [vera]: OES Olivetti EntsorgungsService (Olivetti)

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