septet in WordNet English dictionary

1. the cardinal number that is the sum of six and one
   seven  7  VII  sevener  heptad  septet  septenary 
   
2. a musical composition written for seven performers
   septet  septette 
   
3. seven people considered as a unit
   septet  septette  sevensome 
   
4. a set of seven similar things considered as a unit
   septet  septette 
   
5. seven performers or singers who perform together
   septet  septette