copious

UK: /ˈkəʊpɪəs/ US: /ˈkoʊpiəs/ ,(kō′pē əs)

WordReference Random House Learner's Dictionary of American English © 2026

co•pi•ous /ˈkoʊpiəs/   adj. 

1. large in quantity or number:
   She always takes copious notes in class.
2. producing an abundant supply:
   a copious harvest.

co•pi•ous•ly, adv. 
co•pi•ous•ness, n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2026

co•pi•ous  (kō′pē əs), adj. 

1. large in quantity or number; abundant;
   plentiful:
   copious amounts of food.
2. having or yielding an abundant supply:
   a copious larder; a copious harvest.
3. exhibiting abundance or fullness, as of thoughts or words.

• Latin cōpiōsus plentiful, rich, equivalent. to cōpi(a) wealth (co- co- + op(s) Ops + -ia -ia) + -ōsus -ous
• Middle English 1350–1400

co′pi•ous•ly, adv. 
co′pi•ous•ness, co•pi•os•i•ty  (kō′pē os′i tē), n.  Synonyms

• 1. bountiful.
• 2. See ample. 

Antonyms

• 1. scanty, scarce.
• 3. meager.

Collins Concise English Dictionary © HarperCollins Publishers::

copious / ˈkəʊpɪəs/ adjective

1. abundant; extensive in quantity
2. having or providing an abundant supply
3. full of words, ideas, etc; profuse

Etymology: 14th Century: from Latin cōpiōsus well supplied, from cōpia abundance, from ops wealth

ˈcopiousness noun