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copious (adj) plentiful; abundant.
When something is copious we have it in plenty or in a large quantity. When you talk of copious water supply, you mean the supply of large quantities of water. Copious examples are a large number of examples.
- The river on the banks of which the village stands provides copious water for irrigation, so the village has good crops even if rains fail.
- He supported his theory with copious examples and statistics which fill more than half the book.