cohesion

Short definition from Wiktionary

Noun

1. 1
   State of cohering, or of working together.
2. 2
   Various intermolecular forces that hold solids and liquids together.
3. 3
   Growing together of normally distinct parts of a plant.
4. 4
   Degree to which functionally related elements in a system belong together.
5. 5
   Grammatical or lexical relationship between different parts of the same text.