quartet, quartette or quartett /kwör-tetˈ/

1. A set of four
2. A composition for four voices or instruments
3. A set of performers or instruments for such compositions

• Signior
• Signiors
• sign language
• sign languages
• signless
• sign-manual
• sign-manuals
• sign off
• sign of the cross
• sign on
• sign one's own death warrant
• sign on the dotted line
• Signor
• Signora
• Signoras
• signore
• Signore
• Signores
• signori
• Signori
• signoria
• signorial
• signorias
• signories
• Signorina