/kōˈhēZHən/
Noun
1. The act, state or process of sticking together. (biology-online.org)
2. (Physics)
The intermolecular force that holds together alike molecules in a substance. (biology-online.org)
3. (Chemistry)
The binding together of alike molecules. (biology-online.org)
4. (Botany)
The congenital union of the same parts of plants. (biology-online.org)
Word origin: From French cohésion, from Latin cohaesionem