any number of entities (members) considered as a unit | a basic group of natural objects |
a set that is closed, associative, has an identity element and every element has an inverse | a monarchy with a king or queen as head of state |
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule | the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia |
| the domain ruled by a king or queen |
| a country with a king as head of state |
| a domain in which something is dominant |