What is the meaning of 'copious'?

The term 'copious' means plentiful or abundant in quantity, suggesting that something is available in large amounts. This is why the answer is 'abundant.' When we use 'copious' to describe something, we are often referring to a significant or overwhelming quantity, such as copious notes taken during a lecture or copious rainfall during a storm.

While the words 'limited,' 'rare,' and 'substantial' present contrasting meanings, 'abundant' aligns perfectly with the definition of 'copious,' emphasizing a richness and excess in the quantity being described. This distinction is essential for understanding the contextual use of the term in both written and spoken language.