olemus
sõltub kontekstist

Wiktionary:
4. the state of being secretive

Wordnet 3.0:
2. the quality of being close and poorly ventilated
5. characterized by a lack of openness (especially about one's actions or purposes)

vt ka
- algebraliselt kinnine korpus
- kinnine hulk
- kinnine kasutajarühm
- kinnine koost
- kinnine platvorm
- kinnine teave
- kinnine võrk
- suletud ahelaga
- suletud ruum
- suletud süsteem