dinner suit 
noun
A dinner jacket and trousers, worn with a bow tie on formal occasions.She is wearing a low-cut black evening dress, he a dinner suit....
- He's helped me with a few: "I will get into my skinny dinner suit for Christmas."
- Four of us took off to Oxford Street at noon to hire dinner suits from the smelliest man in London.
- sustain pedal
- sustenance
- sustenance diet
- sustenant
- sustenation
- sustentacular
- sustentacular cell
- sustentaculum
- sustentaculum tali
- sustentation
- sustentation fund
- sustentative
- sustention
- sustentive
- Susu
- susurrate
- susurration
- susurrus
- Sutherland
- Sutherland, Dame Joan
- Sutherland, Donald
- Sutherland, George
- Sutherland, Graham
- sutiaba
- Sutlej