a self-replenishing ecosystem in which life can be maintained without external factors or outside aid.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Culture definitions for closed ecosystem
The Earth is a closed ecosystem.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.