TO I. \(ˈ)tē|ō\abbreviation or noun (-s) : a table of organization < this company is 30 over its TO already — A.J.Guérard > < our TO quota of noncoms is all filled up — James Jones > II. abbreviation 1. technical order 2. telegraph office 3. telephone office 4. tincture of opium 5. transport officer 6. turn over