any number of entities (members) considered as a unit | the act of consorting with or joining with others |
a set that is closed, associative, has an identity element and every element has an inverse | the process of bringing ideas or events together in memory or imagination |
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule | a formal organization of people or groups of people |
| (ecology) a group of organisms (plants and animals) that live together in a certain geographical region and constitute a community with a few dominant species |
| (chemistry) any process of combination (especially in solution) that depends on relatively weak chemical bonding |
| a relation resulting from interaction or dependence |
| a social or business relationship |
| the state of being connected together as in memory or imagination |