a self-replenishing ecosystem in which life can be maintained without external factors or outside aid.
An ecosystem in which no materials can leave or enter but through which energy from external sources can flow.
Note: The Earth is a closed ecosystem.
[klohzd-end] /ˈkloʊzdˈɛnd/ adjective 1. of, relating to, or like a closed-end investment company.
- Closed-end investment company
noun 1. an investment company that issues its shares in large blocks at infrequent intervals and is not obligated to redeem or repurchase them.
noun 1. . closed fracture n. A bone fracture that causes little or no damage to the surrounding soft tissues. Also called simple fracture.
- Closed game
noun 1. (chess) a relatively complex game involving closed ranks and files and permitting only nontactical positional manoeuvring Compare open game